A buzzword dense press release
announcing a new open source project for 'identity management' is hardly
the kind of thing to set hearts to racing. The release did succeed
on one level, however, as it made us wonder what the
openLiberty project is and what it
can do for open source developers. Follow along as we try to shed
some light on the world of internet identities and the standards, protocols
and organizations involved.
An 'internet identity' means different things to different people; often
depending on how they want to use this identity information. A website
owner that allows comments has much less strict requirements for what an
identity is than a hospital or stock broker might have. Some identities
need to be tied to specific individuals, those used for e-commerce, for
instance, whereas others can have
pseudonymity.
Privacy concerns
also play a role in that a user does not necessarily always want to provide
the same information to all parties they want to establish an identity
with; LWN should not (and does not) require your government ID number
in order for one to post comments here, but a stock broker might very
well need it.
The sponsor of openLiberty is the
Liberty Alliance, which is a
consortium of vendors that seeks to provide standards for identity-based
web services. This organization was started by Sun Microsystems in 2001
as a competitor to Microsoft's Passport (aka
Windows Live ID)
single sign-on system. At the time, many were concerned that Microsoft
would become the gatekeeper of internet identity management and that would
likely guarantee that competitors were locked out. Sun put together around 30
vendors and some ideas they had been working on to form the alliance with
the plan to provide open, standards-based solutions for identity management.
Since that time, the alliance has come out with various specifications for
what is, by all accounts, a complex, centralized system for identity
management based around Security
Assertion Markup Language (SAML). SAML is an emerging OASIS standard
that describes the protocol for identity providers to communicate with
service providers to authenticate users. The alliance system is popular with
larger organizations that typically have tighter requirements for identity
management. Websites and services that have simpler needs have largely used
OpenID (LWN article
here) to facilitate single
sign-on.
The openLiberty project is an attempt to attract more interest, especially
from the open source community, in the Liberty system, presumably
to help drive more adoption. The website is a portal geared towards developing
open source libraries to implement various alliance specifications.
The first project is a java client library implementing the
Identity
Web Services Framework (ID-WSF) to provide single sign-on and other
identity-enabled web services. The portal has all the expected features:
a blog, a wiki, a mailing list, a source code repository (hosted by
sourceforge), etc.
As might be expected of a project that has just been announced, there are
few messages in the mailing list archive and the participant list appears
to be largely made up of Liberty Alliance members. Based on the wealth
of information available on the website, the project has already done a lot
of the groundwork to establish the portal. It remains to be seen if it
attracts a significant number of non-allied developers. Choosing a java
client library to start would seem to eliminate some sizable portion of
interested parties; other languages are on the roadmap and that might be
enough to lure in non-java developers.
An interesting convergence of identity management solutions seems to be going
on in the background right now. Proponents of the different systems all
see the benefits
of interoperability and there appear to be some efforts underway to allow
OpenID and Liberty to work together. There is even talk that
Microsoft may join the party and make some kind of effort to interoperate
with Liberty.
There are clear benefits to users in having one system to manage their
internet identity (or identities) across the universe of web services
they might wish to use. Simplicity of implementation for web service
providers and differing levels of security for different classes of service
are also good features to have. One of the ways to get there is by having
competing systems that can interoperate relatively transparently and it
seems like we may be headed in that direction.
The code in centericq which interfaces with the LiveJournal service suffers from a buffer overflow. This vulnerability is exploitable if a user can be convinced to connect to an unofficial LiveJournal server.
From the Red Hat advisory: A bug was found in the way the gtk2 GdkPixbufLoader() function processed
invalid input. Applications linked against gtk2 could crash if they
loaded a malformed image file.
java has multiple vulnerabilities, these include:
an RSA exponent padding attack vulnerability, two vulnerabilities
which allow untrusted applets to access data in other applets,
vulnerabilities that involve applets gaining privileges due to
serialization bugs in the JRE and buffer overflows in the java image
handling routines that can give attackers read/write/execute capabilities
for local files.
It has been discovered that netrik, a text mode WWW browser with vi like
keybindings, doesn't properly sanitize temporary filenames when editing
textareas which could allow attackers to execute arbitrary commands via
shell metacharacters.
Poppler, a PDF loader library does not limit the recursion depth of
the page model tree. If an attacker can trick a user into opening a
specially crafted PDF file, an infinite loop can be caused, leading
to a crash of the calling application. This also affects
kdegraphics and koffice.
Multiple format string vulnerabilities in (1) the cdio_log_handler function
in modules/access/cdda/access.c in the CDDA (libcdda_plugin) plugin, and
the (2) cdio_log_handler and (3) vcd_log_handler functions in
modules/access/vcdx/access.c in the VCDX (libvcdx_plugin) plugin, in
VideoLAN VLC 0.7.0 through 0.8.6 allow user-assisted remote attackers to
execute arbitrary code via format string specifiers in an invalid URI, as
demonstrated by a udp://-- URI in an M3U file.
A post-authentication stack overflow in the EAP handling could be used by
already authenticated attacker to overflow a stack buffer and so
potentially execute code.
Adobes acrobat reader has the following vulnerabilities:
The Adobe Reader Plugin has a cross site scripting vulnerability that
can be triggered by processes malformed URLs. Arbitrary JavaScript can
be served by a malicious web server, leading to a cross-site scripting
attack.
Maliciously crafted PDF files can be used to trigger two vulnerabilities,
if an attacker can trick a user into viewing the files, arbitrary code
can be executed with the user's privileges.
From the Red Hat advisory: "A bug was found in Apache where an invalid Expect header sent to the server
was returned to the user in an unescaped error message. This could
allow an attacker to perform a cross-site scripting attack if a victim was
tricked into connecting to a site and sending a carefully crafted Expect
header."
An off-by-one error in the der_get_oid function in mod_auth_kerb 5.0 allows
remote attackers to cause a denial of service (crash) via a crafted
Kerberos message that triggers a heap-based buffer overflow in the
component array.
hidd in BlueZ (bluez-utils) before 2.25 allows remote attackers to obtain
control of the Mouse and Keyboard Human Interface Device (HID) via a
certain configuration of two HID (PSM) endpoints, operating as a server,
aka HidAttack.
The BusyBox 1.1.1 passwd command does not use a proper salt when generating
passwords. This would create an instance where a brute force attack could
take very little time.
The network monitoring and graphing frontend Cacti has three vulnerabilities.
The cmd.php script allows command line usage and is also installed in a
web-accessible location. The cmd.php input is insufficiently sanitized,
a passed-in URL can be used to inject arbitrary SQL code.
The cmd.php script can be used by a remote attacker to execute arbitrary
shell commands via improperly sanitized results from SQL queries.
Richard Harms discovered that cpio did not sufficiently validate file
properties when creating archives. Files with e. g. a very large size
caused a buffer overflow. By tricking a user or an automatic backup
system into putting a specially crafted file into a cpio archive, a
local attacker could probably exploit this to execute arbitrary code
with the privileges of the target user (which is likely root in an
automatic backup system).
The Vixie cron daemon does not check the return code from setuid(); if that call can be made to fail, a local attacker may be able to execute commands as root.
Will Drewry of the Google Security Team discovered several buffer overflows
in cscope, a source browsing tool, which might lead to the execution of
arbitrary code.
A buffer overflow in Cscope 15.5, and possibly multiple overflows, allows
remote attackers to execute arbitrary code via a C file with a long
#include line that is later browsed by the target.
Cyrus-SASL contains an unspecified vulnerability in the DIGEST-MD5
process that could lead to a Denial of Service. An attacker could possibly
exploit this vulnerability by sending specially crafted data stream to the
Cyrus-SASL server, resulting in a Denial of Service even if the attacker is
not able to authenticate.
Unspecified vulnerability in the match_rule_equal function in bus/signals.c
in D-Bus before 1.0.2 allows local applications to remove match rules for
other applications and cause a denial of service (lost process messages).
The dovecot IMAP server has an error in its index cache file handling code which could be exploited by an authenticated user to execute arbitrary code. Only servers with the (non-default) mmap_disable=yes option setting are vulnerable.
The elinks text-mode browser has an arbitrary file access vulnerability
in the Elinks SMB protocol handler. If a user can be tricked into
visiting a specially crafted web page, arbitrary files may be read or
written with the user's permissions.
Fetchmail suffers from a password disclosure vulnerability due to a failure to use secure protocols (advisory) and a denial of service vulnerability (advisory).
the AVI processing code in FFmpeg has a number of buffer overflow
vulnerabilities.
If an attacker can trick a user into loading a specially crafted
crafted AVI, arbitrary code can be executed with the user's privileges.
The Mozilla Project has released new versions of firefox, thunderbird, and
seamonkey to address the usual pile of security issues; see this announcement or this CERT advisory for details.
Several remote vulnerabilities have been discovered in freeradius, a
high-performance RADIUS server, which may lead to SQL injection or denial
of service.
The FreeType library has several integer overflow vulnerabilities.
If a user can be tricked into installing a specially
crafted font file, arbitrary code can be executed with the privilege
of the user.
Ftpd is vulnerable to a privilege escalation attack,
an incorrect seteuid() call can be used by an FTP user to gain
unauthorized access to files or directories.
The fastjar utility found in the GNU compiler collection does not perform adequate file path checking, allowing the creation or overwriting of files outside of the current directory tree.
A buffer overflow in dwarfread.c and dwarf2read.c debugging code in GNU
Debugger (GDB) 6.5 allows user-assisted attackers, or restricted users, to
execute arbitrary code via a crafted file with a location block
(DW_FORM_block) that contains a large number of operations.
A format string vulnerability has been discovered in gedit. Calling
the program with specially crafted file names caused a buffer
overflow, which could be exploited to execute arbitrary code with the
privileges of the gedit user.
A "stack overwrite" vulnerability in GnuPG (gpg) allows attackers to
execute arbitrary code via crafted OpenPGP packets that cause GnuPG to
dereference a function pointer from deallocated stack memory.
Stack-based buffer overflow in the ps_gettext function in ps.c for GNU gv
3.6.2, and possibly earlier versions, allows user-assisted attackers to
execute arbitrary code via a PostScript (PS) file with certain headers that
contain long comments, as demonstrated using the DocumentMedia header.
Tavis Ormandy of the Google Security Team discovered two denial of service
flaws in the way gzip expanded archive files. If a victim expanded a
specially crafted archive, it could cause the gzip executable to hang or
crash.
Tavis Ormandy of the Google Security Team discovered several code execution
flaws in the way gzip expanded archive files. If a victim expanded a
specially crafted archive, it could cause the gzip executable to crash or
execute arbitrary code.
Kronolith contains a mistake in lib/FBView.php where a raw, unfiltered
string is used instead of a sanitized string to view local files. An
authenticated attacker could craft an HTTP GET request that uses directory
traversal techniques to execute any file on the web server as PHP code,
which could allow information disclosure or arbitrary code execution with
the rights of the user running the PHP application (usually the webserver
user).
Daniel Kobras discovered multiple buffer overflows in ImageMagick's SGI
file format decoder. By tricking a user or an automated system into
processing a specially crafted SGI image, this could be exploited to
execute arbitrary code with the user's privileges.
Multiple buffer overflows in GraphicsMagick before 1.1.7 and ImageMagick
6.0.7 allow user-assisted attackers to cause a denial of service and
possibly execute execute arbitrary code via (1) a DCM image that is not
properly handled by the ReadDCMImage function in coders/dcm.c, or (2) a
PALM image that is not properly handled by the ReadPALMImage function in
coders/palm.c.
M. Joonas Pihlaja discovered that imlib2 did not sufficiently verify the
validity of ARGB, JPG, LBM, PNG, PNM, TGA, and TIFF images. If a user
were tricked into viewing or processing a specially crafted image with
an application that uses imlib2, the flaws could be exploited to execute
arbitrary code with the user's privileges.
Kate / Kwrite, as shipped with KDE 3.2.x up to including 3.4.0, creates a file backup before saving a modified file. These backup files are created with default permissions, even if the original file had more strict permissions set. See this advisory for more information.
The KsIRC 1.3.12 utility in kdenetwork is vulnerable to a remote
denial of service attack that can be caused by a malicious IRC server
sending a long PRIVMSG string. This causes an assertion failure and
an associated NULL pointer dereference.
Sridhar Samudrala discovered a local denial of service vulnerability
in the handling of SCTP sockets. By opening such a socket with a
special SO_LINGER value, a local attacker could exploit this to crash
the kernel. (CVE-2006-4535)
Kirill Korotaev discovered that the ELF loader on the ia64 and sparc
platforms did not sufficiently verify the memory layout. By attempting
to execute a specially crafted executable, a local user could exploit
this to crash the kernel. (CVE-2006-4538)
Some vulnerabilities were discovered in the Linux 2.6 kernel:
There are possibly exploitable bugs in the netfilter for IPv6 code.
(CVE-2006-4572)
The ATM subsystem of the Linux kernel could allow a remote attacker to
cause a Denial of Service (panic) via unknown vectors that cause the ATM
subsystem to access the memory of socket buffers after they are freed.
(CVE-2006-4997)
The ftdi_sio driver (usb/serial/ftdi_sio.c) in Linux kernel 2.6.x up to
2.6.17, and possibly later versions, allows local users to cause a denial
of service (memory consumption) by writing more data to the serial port
than the driver can handle, which causes the data to be queued.
From the MOKB-05-11-2006
advisory: "The ISO9660 filesystem handling code of the Linux
2.6.x kernel fails to properly handle corrupted data structures, leading to
an exploitable denial of service condition. This particular vulnerability
seems to be caused by a race condition and a signedness issue. When
performing a read operation on a corrupted ISO9660 fs stream, the
isofs_get_blocks() function will enter an infinite loop when
__find_get_block_slow() callback from sb_getblk() fails ("due to various
races between file io on the block device and getblk")."
Previous versions of the kernel package are subject to several
vulnerabilities. Certain malformed UDF filesystems can cause the system to
crash (denial of service). Malformed CDROM firmware or USB storage devices
(such as USB keys) could cause system crash (denial of service), and if
they were intentionally malformed, can cause arbitrary code to run with
elevated privileges. In addition, the SCTP protocol is subject to a remote
system crash (denial of service) attack.
A security issue has been reported in Linux kernel due to an error in
drivers/isdn/i4l/isdn_ppp.c as the "isdn_ppp_ccp_reset_alloc_state()"
function never initializes an event timer before scheduling it with the
"add_timer()" function.
The mincore function in the kernel does not properly lock access to user
space, which has unspecified impact and attack vectors, possibly related to
a deadlock.
Another vulnerability has been reported in Linux kernel caused by a
boundary error within the handling of incoming CAPI messages in
net/bluetooth/cmtp/capi.c. This can be exploited to overwrite certain
Kernel data structures.
The KOffice office suite has an integer overflow
vulnerability. If an attacker can trick a user into opening a
specially crafted PowerPoint (PPT) file, KOffice can be caused to crash or
possibly execute arbitrary code with the user's privileges.
The kdamind daemon can, in some situations, perform operations on uninitialized pointers. This bug could conceivably open up the system to a code execution attack by an unauthenticated remote attacker, but it appears to be difficult to exploit. See this advisory for details.
Some kerberos applications fail to check the results of setuid() calls, with the result that, if that call fails, they could continue to execute as root after thinking they had switched to a nonprivileged user. A local attacker who can cause these calls to fail (through resource exhaustion, presumably) could exploit this bug to gain root privileges.
Szymon Zygmunt and Michal Bartoszkiewicz discovered a memory alignment
error in libgadu (from ekg, console Gadu Gadu client, an instant
messaging program) which is included in gaim, a multi-protocol instant
messaging client, as well. This can not be exploited on the x86
architecture but on others, e.g. on Sparc and lead to a bus error,
in other words a denial of service.
The /proc parsing routines in libgtop are vulnerable to a buffer overflow.
If an attacker can run a process in a specially crafted long
path then trick a user into running gnome-system-monitor,
arbitrary code can be executed with the user's privileges.
Luigi Auriemma has reported various boundary errors in load_it.cpp and
a boundary error in the "CSoundFile::ReadSample()" function in
sndfile.cpp. A remote attacker can entice a user to read crafted modules
or ITP files, which may trigger a buffer overflow resulting in the
execution of arbitrary code with the privileges of the user running the
application.
The URI parser in neon versions 0.26.0 through 0.26.2 has a
denial of service vulnerability. Remote servers can cause a crash
by sending a URI with non-ASCII characters.
In pngrutil.c, the function png_decompress_chunk() allocates
insufficient space for an error message, potentially overwriting stack
data, leading to a buffer overflow.
A heap based buffer overflow bug was found in the way libpng strips alpha
channels from a PNG image. An attacker could create a carefully crafted PNG
image file in such a way that it could cause an application linked with
libpng to crash or execute arbitrary code when the file is opened by a
victim.
The t2p_write_pdf_string function in libtiff 3.8.2 and earlier is vulnerable
to a buffer overflow. Attackers can use a TIFF file with UTF-8 characters
in the DocumentName tag to overflow a buffer, causing a denial of service,
and possibly the execution of arbitrary code.
LibVNCServer fails to properly validate protocol types effectively
letting users decide what protocol to use, such as "Type 1 - None".
LibVNCServer will accept this security type, even if it is not offered
by the server.
Yuuichi Teranishi discovered a flaw in libxml2 versions prior to 2.6.6.
When fetching a remote resource via FTP or HTTP, libxml2 uses special
parsing routines. These routines can overflow a buffer if passed a very
long URL. If an attacker is able to find an application using libxml2 that
parses remote resources and allows them to influence the URL, then this
flaw could be used to execute arbitrary code.
libxml2 prior to version 2.6.14 has multiple buffer overflow
vulnerabilities, if a local user passes a specially crafted
FTP URL, arbitrary code may be executed.
An arbitrary command execute bug was found in the lynx "lynxcgi:" URI
handler. An attacker could create a web page redirecting to a malicious URL
which could execute arbitrary code as the user running lynx.
The Mono ASP.NET server XSP has a source disclosure attack vulnerability.
A malicious user can use this to acquire the source code of a server-side
application.
Jean-David Maillefer discovered a format string bug in the
date_format() function's error reporting. By calling the function with
invalid arguments, an authenticated user could exploit this to crash
the server.
MySQL 4.1 before 4.1.21 and 5.0 before 5.0.24 allows a local user to access
a table through a previously created MERGE table, even after the user's
privileges are revoked for the original table, which might violate intended
security policy (CVE-2006-4031).
MySQL 4.1 before 4.1.21, 5.0 before 5.0.25, and 5.1 before 5.1.12, when run
on case-sensitive filesystems, allows remote authenticated users to create
or access a database when the database name differs only in case from a
database for which they have permissions (CVE-2006-4226).
MySQL 5.0.18 and earlier allows local users to bypass logging mechanisms
via SQL queries that contain the NULL character, which are not properly
handled by the mysql_real_query function. NOTE: this issue was originally
reported for the mysql_query function, but the vendor states that since
mysql_query expects a null character, this is not an issue for mysql_query.
Kurt Fitzner discovered that the NBD (network block device) server did not
correctly verify the maximum size of request packets. By sending specially
crafted large request packets, a remote attacker who is allowed to access
the server could exploit this to execute arbitrary code with root
privileges.
By specifying an unsupported address family in the arguments to a LPRT or
LPASV command, an assertion in oftpd will cause the daemon to abort.
Remote, unauthenticated attackers may be able to terminate any oftpd
process, denying service to legitimate users.
slapd in OpenLDAP before 2.3.25 allows remote authenticated users with
selfwrite Access Control List (ACL) privileges to modify arbitrary
Distinguished Names (DN).
packet.c in ssh in OpenSSH allows remote attackers to cause a denial of
service (crash) by sending an invalid protocol sequence with
USERAUTH_SUCCESS before NEWKEYS, which causes newkeys[mode] to be NULL.
An unspecified vulnerability in portable OpenSSH before 4.4, when running
on some platforms, allows remote attackers to determine the validity of
usernames via unknown vectors involving a GSSAPI "authentication abort."
From the OpenSSH 4.5 announcement: "Fix a bug in the sshd privilege separation monitor that weakened its
verification of successful authentication. This bug is not known to
be exploitable in the absence of additional vulnerabilities."
Openssh 4.4 fixes some
security issues, including a pre-authentication denial of service, an
unsafe signal hander and on portable OpenSSH a GSSAPI authentication abort
could be used to determine the validity of usernames on some platforms.
The opera browser has a heap overflow vulnerability involving the DHT
markers in JPEG files. If a specially crafted JPEG files is read
on a web site, arbitrary code may be executed with the privileges of the
user.
Also, the createSVGTransformFromMatrix() function does not correctly
handle passed-in objects, this can be used to execute arbitrary code.
The file_exists and imap_reopen functions in PHP before 5.1.5 do not check
for the safe_mode and open_basedir settings, which allows local users to
bypass the settings (CVE-2006-4481).
A buffer overflow in the LWZReadByte function in ext/gd/libgd/gd_gif_in.c
in the GD extension in PHP before 5.1.5 allows remote attackers to have an
unknown impact via a GIF file with input_code_size greater than
MAX_LWZ_BITS, which triggers an overflow when initializing the table array
(CVE-2006-4484).
The stripos function in PHP before 5.1.5 has unknown impact and attack
vectors related to an out-of-bounds read (CVE-2006-4485).
The Hardened-PHP Project discovered buffer overflows in
htmlentities/htmlspecialchars internal routines to the PHP Project. Of
course the whole purpose of these functions is to be filled with user
input. (The overflow can only be when UTF-8 is used)
It was discovered that phpbb2, a web based bulletin board, insufficiently
sanitizes values passed to the "Font Color 3" setting, which might lead to
the execution of injected code by admin users.
The phpbb2 web forum has a number of vulnerabilities including:
a web script injection problem, a protection mechanism bypass, a
security check bypass, a remote global variable bypass, cross site
scripting vulnerabilities, an SQL injection vulnerability,
a remote regular expression modification problem, missing input
sanitizing, and a missing request validation problem.
The PostgreSQL team has put out a set of "urgent updates" (in the form of the 7.3.15, 7.4.13, 8.0.8, and 8.1.4 releases) closing a
newly-discovered set of SQL injection issues. Details about the problem
can be found on the
technical information page; in short: multi-byte encodings can be used
to defeat normal string sanitizing techniques. The update fixes one problem
related to invalid multi-byte characters, but punts on another by simply
disallowing the old, unsafe technique of escaping single quotes with a
backslash.
A denial of service (DoS) vulnerability exists in the FTP server ProFTPD, up
to and including version 1.3.0. The flaw is due to both a potential bus
error and a definitive buffer overflow in the code which determines the FTP
command buffer size limit. The vulnerability can be exploited only if the
"CommandBufferSize" directive is explicitly used in the server
configuration.
A vulnerability exists in the FTP server ProFTPD, versions up to and
including 1.3.0a. The vulnerability is caused by a stack-based buffer
overflow in the "pr_ctrls_recv_request" function of the "Controls"
feature. This is an optional feature of ProFTPD server which is by default
disabled in OpenPKG and probably other distributions.
An error was found in the RPM library's handling of query reports. In
some locales, certain RPM packages would cause the library to crash. If
a user was tricked into querying a specially crafted RPM package, the
flaw could be exploited to execute arbitrary code with the user's
privileges.
The useradd tool from the shadow-utils package has a potential security
problem. When a new user's mailbox is created, the permissions are
set to random garbage from the stack, potentially allowing the
file to be read or written during the time before fchmod() is called.
Multiple cross-site scripting (XSS) vulnerabilities in SquirrelMail 1.4.0
through 1.4.9 allow remote attackers to inject arbitrary web script or HTML
via the mailto parameter in webmail.php, the session and delete_draft
parameters in compose.php, and unspecified vectors involving "a shortcoming
in the magicHTML filter."
A buffer overflow in UnZip 5.50 and earlier allows local users to execute
arbitrary code via a long filename command line argument. NOTE: since the
overflow occurs in a non-setuid program, there are not many scenarios under
which it poses a vulnerability, unless unzip is passed long arguments when
it is invoked from other programs.
xtensive testing of libwww's handling of multipart/byteranges content from
HTTP/1.1 servers revealed multiple logical flaws and bugs in
Library/src/HTBound.c
The wget http file retriever application has a problem with the
ftp_syst function in ftp-basic.c. A malicious FTP server which sends
a large number of blank 220 responses to the SYST command can cause
wget to crash, resulting in a denial of service.
When decoding trackbacks with alternate character sets, WordPress does
not correctly sanitize the entries before further modifying a SQL
query. WordPress also displays different error messages in wp-login.php
based upon whether or not a user exists. David Kierznowski has
discovered that WordPress fails to properly sanitize recent file
information in /wp-admin/templates.php before sending that information
to a browser. An attacker could inject arbitrary SQL into WordPress
database queries. An attacker could also determine if a WordPress user
existed by trying to login as that user, better facilitating brute force
attacks. Lastly, an attacker authenticated to view the administrative
section of a WordPress instance could try to edit a file with a malicious
filename; this may cause arbitrary HTML or JavaScript to be executed in
users' browsers viewing /wp-admin/templates.php.
A buffer overflow was discovered in the Real Media input plugin in
xine-lib. If a user were tricked into loading a specially crafted stream
from a malicious server, the attacker could execute arbitrary code with the
user's privileges.
xine-lib does an improper input data boundary check on
MPEG streams. A specially crafted MPEG file can be
created that can cause arbitrary code execution when the
file is accessed.
Several format string vulnerabilities have been discovered in xine-ui,
the user interface of the xine video player, which may cause a denial
of service.
A race condition allows local users to see error messages generated during
another user's X session. This could allow potentially sensitive
information to be leaked.
Several X.org libraries and X.org itself contain system calls to
set*uid() functions, without checking their result. Local users could
deliberately exceed their assigned resource limits and elevate their
privileges after an unsuccessful set*uid() system call. This requires
resource limits to be enabled on the machine.
A number of integer overflows have turned up in the X.org server. Some of these overflows involve calls to alloca(), and thus make corruption of the stack relatively easy. This vulnerability is exploitable by anybody who can make a connection to the server, meaning that it is a local root exploit in most settings. See this advisory for details.
