Greasemonkey gets into trouble
The ability to add extensions to Firefox has proven to be a popular
feature. One of the most popular extensions for Firefox, inspiring
countless user scripts, is the
Greasemonkey extension, which
allows users change the behavior of web sites.
A serious vulnerability was found in Greasemonkey last
week by Mark Pilgrim, author of the upcoming book "Greasemonkey Hacks,"
and Dive Into
Greasemonkey. Pilgrim discovered that a combination of two flaws in
Greasemonkey could allow user data to be transmitted to virtually any
site.
We spoke to Pilgrim about the vulnerabilities, and the security of
Greasemonkey in general. According to Pilgrim, Greasemonkey's first flaw
would allow a web page access to the APIs to call remote pages. A page with
an exploit for this vulnerability would allow the exploit to call code from
other sites without the user being aware of it. This could include posting
data to another site.
The second exploit allowed pages to access file URLs, which could allow a
remote site to browse the content of a user's hard drive. In conjunction
with the first vulnerability, "remote pages could access any file on
your system... [they could] recurse through the entire hard drive and post
it anywhere in the world, really. And that's bad."
These vulnerabilities are fixed in the 3.5 version of Greasemonkey, though
it
is a "neutered" version that lacks the Greasemonkey
APIs. Pilgrim said that a beta had
been released that should retain functionality and clear up the
security holes that he had found.
The new version disables file URLs altogether for that API function, so
even user scripts are not allowed to do that anymore, and second of all,
closes the hole that allows remote page you're browsing to trap the API
call. The pages you browse now no longer have access to any of the
Greasemonkey internals. User scripts can still use it... but the page
you're browsing can't steal access to those pages.
Even though the vulnerability has been closed in the latest versions of
Greasemonkey, Pilgrim said that users could still be vulnerable to
malicious user scripts. "Greasemonkey is very powerful, and people
need to be aware what they're installing." Indeed, there does seem
to be a level of concern that the problems with Greasemonkey are in its
features, not its vulnerabilities. The concept of allowing users to run
scripts in the browser developed by third parties, who may not have the
users' best interests in mind, opens up some scary possibilities.
Since Firefox and Greasemonkey are becoming increasingly popular with less
technical users, we asked Pilgrim how those users could verify that the
scripts they install were safe, and if there was any way for the
Greasemonkey team to protect those users.
Basically, there's no technical solution to that, Greasemonkey allows you
so much power, that you can't stop people from writing malicious
scripts...without making Greasemonkey useless.
We also asked Chris Hofmann, director of engineering for Mozilla, about the
Greasemonkey vulnerability and whether the Mozilla developers could do
anything to make extensions safer for users. Hofmann also said that much of
the responsibility lies with the user to verify the source and function of
extensions. "Users should take caution for any extensions they
download, and to authenticate the source of the extension." He also
explained that the default operation of the browser was to warn users
before installing any software, to prevent any extensions or scripts from
being installed without the user's knowledge.
It's worth noting that Firefox is not unique in allowing extensions or
add-ons like Greasemonkey. Pilgrim noted that Turnabout for Internet
Explorer performed the same function for IE, by allowing users to run
scripts to change the function of websites. Just as with Firefox, Turnabout
users could easily run malicious scripts if they're not careful about where
they acquire them.
There's really nothing unique about the Greasemonkey situation,
though. Spyware and adware have propagated in large part because users have
been willing to download and install software without questioning the
source of the software or any possible side-effects.
The best that the Greasemonkey team can do is ensure that their software is
not subject to vulnerabilities like the two that Pilgrim discovered. Beyond
that, the responsibility will remain with the user to verify that
extensions, scripts and other software is suitable for use.
Comments (4 posted)
New vulnerabilities
ClamAntiVirus: integer overflows
| Package(s): | clamav |
CVE #(s): | CAN-2005-2450
|
| Created: | July 26, 2005 |
Updated: | August 16, 2005 |
| Description: |
Clam AntiVirus versions < 0.86.2 is vulnerable to integer overflows when
handling the TNEF, CHM and FSG file formats. By sending a
specially-crafted file an attacker could execute arbitrary code with the
permissions of the user running Clam AntiVirus. |
| Alerts: |
|
Comments (none posted)
fetchmail: buffer overflow
| Package(s): | fetchmail |
CVE #(s): | CAN-2005-2335
|
| Created: | July 21, 2005 |
Updated: | August 12, 2005 |
| Description: |
The fetchmail POP3 client has an arbitrary code execution vulnerability
that may be triggered by a malicious POP server. See this advisory for more information. |
| Alerts: |
|
Comments (none posted)
httpd: off-by-one overflow and cross-site scripting
| Package(s): | apache httpd |
CVE #(s): | CAN-2005-1268
CAN-2005-2088
|
| Created: | July 25, 2005 |
Updated: | November 7, 2005 |
| Description: |
Watchfire reported a flaw that occurred when using the Apache server as an
HTTP proxy. A remote attacker could send an HTTP request with both a
"Transfer-Encoding: chunked" header and a "Content-Length" header. This
caused Apache to incorrectly handle and forward the body of the request in
a way that the receiving server processes it as a separate HTTP request.
This could allow the bypass of Web application firewall protection or lead
to cross-site scripting (XSS) attacks.
Marc Stern reported an off-by-one overflow in the mod_ssl CRL verification
callback. In order to exploit this issue the Apache server would need to
be configured to use a malicious certificate revocation list (CRL). |
| Alerts: |
|
Comments (none posted)
libgadu: integer overflows
| Package(s): | libgadu |
CVE #(s): | CAN-2005-1852
|
| Created: | July 22, 2005 |
Updated: | July 27, 2005 |
| Description: |
libgadu, a library implementing the Gadu messaging protocol, suffers from a set of integer overflow vulnerabilities. This vulnerability affects a number of other packages; see, for example, this KDE advisory for kdenetwork and Kopete. |
| Alerts: |
|
Comments (none posted)
movemail: arbitrary code execution
| Package(s): | movemail |
CVE #(s): | |
| Created: | July 21, 2005 |
Updated: | July 27, 2005 |
| Description: |
The emacs movemail POP utility has an arbitrary code execution vulnerability
that can be activated by connecting to a malicious POP server. |
| Alerts: |
|
Comments (none posted)
phpbb2: cross-site scripting
| Package(s): | phpbb2 |
CVE #(s): | CAN-2005-2161
|
| Created: | July 27, 2005 |
Updated: | July 27, 2005 |
| Description: |
The phpbb2 package suffers from a cross-site scripting vulnerability. |
| Alerts: |
|
Comments (none posted)
sandbox: insecure temporary file handling
| Package(s): | sandbox |
CVE #(s): | |
| Created: | July 25, 2005 |
Updated: | July 27, 2005 |
| Description: |
The Gentoo Linux Security Audit Team discovered that the sandbox
utility was vulnerable to multiple TOCTOU (Time of Check, Time of Use)
file creation race conditions. Local users may be able to create or overwrite arbitrary files with the permissions of the root user. |
| Alerts: |
|
Comments (none posted)
shorewall: rule bypass vulnerability
| Package(s): | shorewall |
CVE #(s): | CAN-2005-2317
|
| Created: | July 21, 2005 |
Updated: | October 10, 2005 |
| Description: |
Shorewall has a vulnerability in which a client that is accepted by
MAC address filtering can bypass other rules, allowing access to
all open services on the firewall. |
| Alerts: |
|
Comments (none posted)
vim: arbitrary command execution
| Package(s): | vim |
CVE #(s): | CAN-2005-2368
|
| Created: | July 26, 2005 |
Updated: | August 23, 2005 |
| Description: |
Georgi Guninski discovered
that it was possible to construct Vim 6.3 modelines that execute arbitrary
shell commands by wrapping them in glob() or expand() function calls. If an
attacker tricked an user to open a file with a specially crafted modeline,
he could exploit this to execute arbitrary commands with the user's
privileges. |
| Alerts: |
|
Comments (1 posted)
webcalendar: information disclosure
| Package(s): | webcalendar |
CVE #(s): | CAN-2005-2320
|
| Created: | July 27, 2005 |
Updated: | July 27, 2005 |
| Description: |
The webcalendar utility suffers from an information disclosure vulnerability. |
| Alerts: |
|
Comments (none posted)
zlib: buffer overflow
| Package(s): | zlib |
CVE #(s): | CAN-2005-1849
|
| Created: | July 21, 2005 |
Updated: | April 11, 2006 |
| Description: |
zlib has a vulnerability that can cause code that executes it to crash
if a corrupted file is opened. |
| Alerts: |
|
Comments (none posted)
Updated vulnerabilities
a2ps: input validation error
| Package(s): | a2ps |
CVE #(s): | CAN-2004-1170
CAN-2004-1377
|
| Created: | November 26, 2004 |
Updated: | December 19, 2005 |
| Description: |
The GNU a2ps utility fails to properly sanitize filenames, which can be
abused by a malicious user to execute arbitrary commands with the
privileges of the user running the vulnerable application. More
information at Security
Focus. |
| Alerts: |
|
Comments (none posted)
affix: two remote vulnerabilities
| Package(s): | affix |
CVE #(s): | CAN-2005-2250
CAN-2005-2277
|
| Created: | July 19, 2005 |
Updated: | September 2, 2005 |
| Description: |
A buffer overflow in the Bluetooth FTP client (BTFTP) in Nokia Affix 2.1.2
and 3.2.0 allows remote attackers to execute arbitrary code via a long
filename in an OBEX file share. Also remote attackers may execute
arbitrary commands via shell metacharacters in the filename argument of a
PUT command. |
| Alerts: |
|
Comments (none posted)
bzip2: race condition and infinite loop
| Package(s): | bzip2 |
CVE #(s): | CAN-2005-0953
CAN-2005-1260
|
| Created: | May 17, 2005 |
Updated: | January 10, 2007 |
| Description: |
A race condition in bzip2 1.0.2 and earlier allows local users to modify
permissions of arbitrary files via a hard link attack on a file while it is
being decompressed, whose permissions are changed by bzip2 after the
decompression is complete. Also specially crafted bzip2 archives may cause
an infinite loop in the decompressor. |
| Alerts: |
|
Comments (2 posted)
cacti: SQL injection and PHP file inclusion
| Package(s): | cacti |
CVE #(s): | |
| Created: | June 22, 2005 |
Updated: | July 21, 2005 |
| Description: |
Cacti (prior to version 0.8.6e) suffers from vulnerabilities which can lead to SQL injection and (on some systems) execution of arbitrary PHP files. |
| Alerts: |
|
Comments (none posted)
cpio - file permissions error
| Package(s): | cpio |
CVE #(s): | CAN-1999-1572
|
| Created: | February 2, 2005 |
Updated: | July 19, 2005 |
| Description: |
Some versions of cpio contain an ancient vulnerability where files created by that utility have overly generous access permissions. |
| Alerts: |
|
Comments (none posted)
cpio: directory traversal
| Package(s): | cpio |
CVE #(s): | CAN-2005-1111
|
| Created: | June 20, 2005 |
Updated: | December 26, 2005 |
| Description: |
There is a vulnerability in
cpio (2.6 and previous) that allows a malicious cpio file to
extract to an arbitrary directory of the attackers choice. cpio will
extract to the path specified in the cpio file, this path can be absolute. |
| Alerts: |
|
Comments (1 posted)
CUPS: multiple vulnerabilities
| Package(s): | CUPS |
CVE #(s): | CAN-2004-2154
|
| Created: | July 14, 2005 |
Updated: | September 20, 2005 |
| Description: |
The CUPS printing system has a problem with queue name
case-sensitivity matching that can cause a security policy override. An
unauthorized user can use this to gain print to a protected queue. |
| Alerts: |
|
Comments (none posted)
cURL: buffer overflow
| Package(s): | curl |
CVE #(s): | CAN-2005-0490
|
| Created: | February 28, 2005 |
Updated: | July 19, 2005 |
| Description: |
Multiple stack-based buffer overflows in libcURL and cURL 7.12.1, and
possibly other versions, allow remote malicious web servers to execute
arbitrary code via base64 encoded replies that exceed the intended buffer
lengths when decoded. |
| Alerts: |
|
Comments (none posted)
cyrus-imapd: buffer overflows
| Package(s): | cyrus-imapd |
CVE #(s): | CAN-2005-0546
|
| Created: | February 23, 2005 |
Updated: | April 9, 2006 |
| Description: |
Cyrus-imapd, prior to version 2.2.12, contains several buffer overflows which could be exploited by an (authenticated) attacker to run code on the server system. |
| Alerts: |
|
Comments (none posted)
dbus: information disclosure
| Package(s): | dbus |
CVE #(s): | CAN-2005-0201
|
| Created: | June 8, 2005 |
Updated: | August 30, 2005 |
| Description: |
From the Red Hat alert: "Dan Reed discovered that a user can send and listen to messages on another
user's per-user session bus if they know the address of the socket." At current usage levels, this vulnerability is not particularly threatening. |
| Alerts: |
|
Comments (none posted)
dhcpcd: denial of service
| Package(s): | dhcpcd |
CVE #(s): | CAN-2005-1848
|
| Created: | July 13, 2005 |
Updated: | September 13, 2005 |
| Description: |
The dhcpcd DHCP client can be tricked into reading past the end of a buffer, causing it to crash.
|
| Alerts: |
|
Comments (none posted)
Dnsmasq: poisoning and DoS
| Package(s): | dnsmasq |
CVE #(s): | |
| Created: | April 4, 2005 |
Updated: | July 21, 2005 |
| Description: |
Dnsmasq does not properly detect that DNS replies received do not
correspond to any DNS query that was sent. Rob Holland of the Gentoo Linux
Security Audit team also discovered two off-by-one buffer overflows that
could crash DHCP lease files parsing. |
| Alerts: |
|
Comments (none posted)
ekg: multiple vulnerabilities
| Package(s): | ekg |
CVE #(s): | CAN-2005-1850
CAN-2005-1851
CAN-2005-1916
|
| Created: | July 18, 2005 |
Updated: | August 8, 2005 |
| Description: |
Several vulnerabilities have been discovered in the ekg
contributed scripts. These include an
insecure temporary file creation problem, a
potential shell command injection problem, and an
arbitrary command execution problem. |
| Alerts: |
|
Comments (none posted)
emacs21: format string vulnerability in "movemail"
| Package(s): | emacs21 |
CVE #(s): | CAN-2005-0100
|
| Created: | February 7, 2005 |
Updated: | May 15, 2006 |
| Description: |
Max Vozeler discovered a format string vulnerability in the "movemail"
utility of Emacs. By sending specially crafted packets, a malicious
POP3 server could cause a buffer overflow, which could be exploited to
execute arbitrary code with the privileges of the user and the "mail"
group. |
| Alerts: |
|
Comments (none posted)
enscript: arbitrary code execution
| Package(s): | enscript |
CVE #(s): | CAN-2004-1184
CAN-2004-1185
CAN-2004-1186
|
| Created: | January 21, 2005 |
Updated: | May 27, 2006 |
| Description: |
Erik Sjölund has discovered several security relevant problems in enscript,
a program to convert ASCII text into Postscript and other formats.
Unsanitized input can cause the execution of arbitrary commands via EPSF
pipe support. Due to missing sanitizing of filenames it is possible that a
specially crafted filename can cause arbitrary commands to be executed.
Multiple buffer overflows can cause the program to crash. |
| Alerts: |
|
Comments (none posted)
evolution: message crash vulnerability
| Package(s): | evolution |
CVE #(s): | CAN-2005-0806
|
| Created: | March 17, 2005 |
Updated: | August 11, 2005 |
| Description: |
The Evolution mail client can be crashed when reading
certain types of messages. |
| Alerts: |
|
Comments (none posted)
Foomatic: Arbitrary command execution in foomatic-rip
| Package(s): | foomatic |
CVE #(s): | CAN-2004-0801
|
| Created: | September 20, 2004 |
Updated: | May 31, 2006 |
| Description: |
There is a vulnerability in the foomatic-filters package. This
vulnerability is due to insufficient checking of command-line parameters
and environment variables in the foomatic-rip filter. This vulnerability
may allow both local and remote attackers to execute arbitrary commands on
the print server with the permissions of the spooler. |
| Alerts: |
|
Comments (none posted)
gdb: multiple vulnerabilities
| Package(s): | gdb |
CVE #(s): | CAN-2005-1704
CAN-2005-1705
|
| Created: | May 20, 2005 |
Updated: | August 11, 2006 |
| Description: |
Tavis Ormandy of the Gentoo Linux Security Audit Team discovered an integer
overflow in the BFD library, resulting in a heap overflow. A review also
showed that by default, gdb insecurely sources initialization files from
the working directory. Successful exploitation would result in the
execution of arbitrary code on loading a specially crafted object file or
the execution of arbitrary commands. |
| Alerts: |
|
Comments (5 posted)
gtk-pixbuf, gtk2: denial of service
| Package(s): | gdk-pixbuf gtk2 |
CVE #(s): | CAN-2005-0891
|
| Created: | March 30, 2005 |
Updated: | December 19, 2005 |
| Description: |
The BMP image processing code in gdk-pixbuf and gtk2 contains a denial of service vulnerability exploitable via a specially crafted image file.
|
| Alerts: |
|
Comments (none posted)
gettext: Insecure temporary file handling
| Package(s): | gettext |
CVE #(s): | CAN-2004-0966
|
| Created: | October 11, 2004 |
Updated: | March 1, 2006 |
| Description: |
gettext insecurely creates temporary files in world-writeable directories
with predictable names. A local attacker could create symbolic links in
the temporary files directory, pointing to a valid file somewhere on the
filesystem. When gettext is called, this would result in file access with
the rights of the user running the utility, which could be the root user. |
| Alerts: |
|
Comments (1 posted)
ghostscript: symlink vulnerabilities
| Package(s): | ghostscript |
CVE #(s): | CAN-2004-0967
|
| Created: | October 20, 2004 |
Updated: | September 28, 2005 |
| Description: |
The ghostscript package (prior to version 7.07.1-r7) contains several scripts which are vulnerable to symlink attacks. |
| Alerts: |
|
Comments (none posted)
glibc: tempfile vulnerability in catchsegv script
| Package(s): | glibc |
CVE #(s): | CAN-2004-0968
|
| Created: | October 21, 2004 |
Updated: | November 14, 2005 |
| Description: |
The catchsegv script in the glibc package has a symlink vulnerability
that may allow a local user to overwrite arbitrary
files with the permissions of the user that is running the script. |
| Alerts: |
|
Comments (none posted)
gnupg: information leak
| Package(s): | gnupg |
CVE #(s): | CAN-2005-0366
|
| Created: | March 16, 2005 |
Updated: | August 19, 2005 |
| Description: |
GnuPG (and other PGP-like systems) suffers from an information leak which could, in some situations, be used by an attacker to obtain plain text from an encrypted message. See this message for a detailed explanation of the problem. "We know of no real-world application that is affected by this type of attack. It is an attack that requires the active participation of someone who holds the actual key required to decrypt a message. Thus, it is not something you are likely to see." |
| Alerts: |
|
Comments (none posted)
grip: buffer overflow
| Package(s): | grip |
CVE #(s): | CAN-2005-0706
|
| Created: | March 10, 2005 |
Updated: | September 16, 2005 |
| Description: |
Grip, a CD ripper, has a buffer overflow vulnerability that can
occur when the CDDB server returns more than 16 matches. |
| Alerts: |
|
Comments (none posted)
groff: insecure temporary directory
| Package(s): | groff |
CVE #(s): | CAN-2004-0969
|
| Created: | November 1, 2004 |
Updated: | February 9, 2006 |
| Description: |
Recently, Trustix Secure Linux discovered a vulnerability in the groff
package. The utility "groffer" created a temporary directory in an
insecure way, which allowed exploitation of a race condition to create
or overwrite files with the privileges of the user invoking the
program. |
| Alerts: |
|
Comments (none posted)
gxine: format string vulnerability
| Package(s): | gxine |
CVE #(s): | CAN-2005-1692
|
| Created: | May 26, 2005 |
Updated: | July 23, 2005 |
| Description: |
The gxine media player has a format string vulnerability in the
hostname decoding function. A specially crafted file can be used
to cause a user to execute arbitrary code. |
| Alerts: |
|
Comments (none posted)
heartbeat: insecure temporary files
| Package(s): | heartbeat |
CVE #(s): | CAN-2005-2231
|
| Created: | July 19, 2005 |
Updated: | August 15, 2005 |
| Description: |
Eric Romang discovered several insecure temporary file creations in
the High Availability Linux Project Heartbeat 1.2.3. |
| Alerts: |
|
Comments (none posted)
htdig: cross site scripting
| Package(s): | htdig |
CVE #(s): | CAN-2005-0085
|
| Created: | February 14, 2005 |
Updated: | January 10, 2006 |
| Description: |
Michael Krax discovered that ht://Dig fails to validate the 'config'
parameter before displaying an error message containing the parameter.
This flaw could allow an attacker to conduct cross-site scripting
attacks. |
| Alerts: |
|
Comments (none posted)
imap: buffer overflow in c-client
| Package(s): | imap |
CVE #(s): | CAN-2003-0297
|
| Created: | February 18, 2005 |
Updated: | April 9, 2006 |
| Description: |
A buffer overflow flaw was found in the c-client IMAP client. An attacker
could create a malicious IMAP server that if connected to by a victim could
execute arbitrary code on the client machine. |
| Alerts: |
|
Comments (none posted)
imlib2: buffer overflows
| Package(s): | imlib2 |
CVE #(s): | CAN-2004-0802
CAN-2004-0817
|
| Created: | September 8, 2004 |
Updated: | October 26, 2005 |
| Description: |
The imlib2 library contains buffer overflows in the BMP handling code. |
| Alerts: |
|
Comments (none posted)
infozip: privilege escalation, directory-traversal
| Package(s): | infozip |
CVE #(s): | CAN-2003-0282
CAN-2004-1010
CAN-2005-0602
|
| Created: | May 2, 2005 |
Updated: | August 1, 2005 |
| Description: |
InfoZip reports that Zip 2.3 and
(presumably) all previous versions have a buffer-overrun vulnerability
relating to deep directory paths that could potentially lead to local
privilege escalation (e.g., in the case of automated, Zip-based backups).
All versions of UnZip through 5.50 have a number of directory-traversal
vulnerabilities. |
| Alerts: |
|
Comments (1 posted)
junkbuster: heap corruption and settings modification
| Package(s): | junkbuster |
CVE #(s): | CVE-2005-1108
CVE-2005-1109
|
| Created: | April 13, 2005 |
Updated: | November 5, 2005 |
| Description: |
JunkBuster through version 2.02-r2 contains two vulnerabilities: a heap corruption bug and a possible privacy violation. |
| Alerts: |
|
Comments (1 posted)
kdelibs: unsanitzied input
| Package(s): | kdelibs |
CVE #(s): | CAN-2004-1165
|
| Created: | January 10, 2005 |
Updated: | July 19, 2005 |
| Description: |
Thiago Macieira discovered a vulnerability in the kioslave library,
which is part of kdelibs, which allows a remote attacker to execute
arbitrary FTP commands via an ftp:// URL that contains an URL-encoded
newline before the FTP command. |
| Alerts: |
|
Comments (none posted)
kdelibs: kate backup file permission leak
| Package(s): | kdelibs kate kwrite |
CVE #(s): | CAN-2005-1920
|
| Created: | July 19, 2005 |
Updated: | November 27, 2006 |
| Description: |
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. |
| Alerts: |
|
Comments (none posted)
kernel: ELF loader core dump vulnerability
| Package(s): | kernel |
CVE #(s): | CAN-2005-1263
|
| Created: | May 11, 2005 |
Updated: | August 25, 2005 |
| Description: |
Paul Starzetz has posted an
advisory for yet another kernel vulnerability.
In this case, by using a specially manipulated ELF binary, a local attacker
can compromise the system (via the core dump code) and obtain root access.
This vulnerability affects all kernels from 2.2 through 2.6.12-rc4. |
| Alerts: |
|
Comments (none posted)
kernel: multiple vulnerabilities
| Package(s): | kernel |
CVE #(s): | CAN-2005-1913
CAN-2005-1761
|
| Created: | July 1, 2005 |
Updated: | September 9, 2005 |
| Description: |
Several vulnerabilities in the 2.6 kernel have been
fixed, including a subthread exec problem (CAN-2005-1913)
and a ia64 ptrace + sigrestore_context problem (CAN-2005-1761). |
| Alerts: |
|
Comments (1 posted)
kernel: multiple vulnerabilities
Comments (none posted)
krb5: double-free flaw
| Package(s): | krb5 |
CVE #(s): | CAN-2004-0175
CAN-2005-0488
CAN-2005-1175
CAN-2005-1689
|
| Created: | July 12, 2005 |
Updated: | December 6, 2005 |
| Description: |
The krb5 authentication has a double-free flaw which may be
initiated by a remote unauthenticated attacker.
Also, a single byte heap overflow in the krb5_unparse_name() function
can lead to a denial of service and an information disclosure may
be caused by a malicious telnet server. See
This report for more
information. |
| Alerts: |
|
Comments (none posted)
libconvert-uulib-perl: arbitrary code execution
| Package(s): | libconvert-uulib-perl |
CVE #(s): | CAN-2005-1349
|
| Created: | May 20, 2005 |
Updated: | January 27, 2006 |
| Description: |
Mark Martinec and Robert Lewis discovered a buffer overflow in
Convert::UUlib (before 1.051), a Perl interface to the uulib library, which
may result in the execution of arbitrary code. |
| Alerts: |
|
Comments (1 posted)
libdbi-perl: insecure temporary file
| Package(s): | libdbi-perl |
CVE #(s): | CAN-2005-0077
|
| Created: | January 25, 2005 |
Updated: | March 2, 2006 |
| Description: |
Javier Fernández-Sanguino Peña from the Debian Security Audit Project
discovered that the DBI library, the Perl5 database interface, creates
a temporary PID file in an insecure manner. This can be exploited by a
malicious user to overwrite arbitrary files owned by the person
executing the parts of the library. |
| Alerts: |
|
Comments (none posted)
libgd2: buffer overflows in PNG handling
| Package(s): | libgd2 |
CVE #(s): | CAN-2004-0990
CAN-2004-0941
|
| Created: | October 29, 2004 |
Updated: | June 28, 2006 |
| Description: |
Several buffer overflows have been discovered in libgd's PNG handling
functions.
If an attacker tricked a user into loading a malicious PNG image, they
could leverage this into executing arbitrary code in the context of
the user opening image. Most importantly, this library is commonly
used in PHP. One possible target would be a PHP driven photo website
that lets users upload images. Therefore this vulnerability might lead
to privilege escalation to a web server's privileges.
Multiple buffer overflows in the gd graphics library (libgd) 2.0.21 and
earlier may allow remote attackers to execute arbitrary code via malformed
image files that trigger the overflows due to improper calls to the
gdMalloc function. |
| Alerts: |
|
Comments (none posted)
libnet-ssleay-perl: weakened cryptographic operations
| Package(s): | libnet-ssleay-perl |
CVE #(s): | CAN-2005-0106
|
| Created: | May 3, 2005 |
Updated: | January 27, 2006 |
| Description: |
Javier Fernandez-Sanguino Pena discovered that this library used the
file /tmp/entropy as a fallback entropy source if a proper source was
not set in the environment variable EGD_PATH. This can potentially
lead to weakened cryptographic operations if an attacker provides a
/tmp/entropy file with known content. |
| Alerts: |
|
Comments (none posted)
libTIFF: buffer overflow
