Security

Hayawardh Vijayakumar noticed that the apache2ctl script created the lock directory in an unsafe manner, allowing a local attacker to gain elevated privileges via a symlink attack. This is a Debian specific issue.

From the Debian advisory:

Malcolm Scott discovered a remote-exploitable buffer overflow in the rfc1413 (ident) client of cfingerd, a configurable finger daemon. This vulnerability was introduced in a previously applied patch to the cfingerd package in 1.4.3-3.

A portion of memory (random stack data) disclosure flaw was found in the way dtach, a simple program emulating the detach feature of screen, performed client connection termination under certain circumstances. A remote attacker could use this flaw to potentially obtain sensitive information by issuing a specially-crafted dtach client connection close request.

A denial of service flaw was found in the way Ekiga, a Gnome based SIP/H323 teleconferencing application, processed information from certain OPAL connections (UTF-8 strings were not verified for validity prior showing them). A remote attacker (other party with a not UTF-8 valid name) could use this flaw to cause ekiga executable crash.

It was discovered that Git's git-imap-send command, a tool to send a collection of patches from standard input (stdin) to an IMAP folder, did not properly perform SSL X.509 v3 certificate validation on the IMAP server's certificate, as it did not ensure that the server's hostname matched the one provided in the CN field of the server's certificate. A rogue server could use this flaw to conduct man-in-the-middle attacks, possibly leading to the disclosure of sensitive information.

A security flaw was found in the way isync, a command line application to synchronize IMAP4 and Maildir mailboxes, (previously) performed server's SSL x509.v3 certificate validation, when performing IMAP protocol based synchronization (server's hostname was previously not compared for match the CN field of the certificate). A rogue server could use this flaw to conduct man-in-the-middle (MiTM) attacks, possibly leading to disclosure of sensitive information.

From the Xen advisory:

The Xen netback implementation contains a couple of flaws which can allow a guest to cause a DoS in the backend domain, potentially affecting other domains in the system.

CVE-2013-0216 is a failure to sanity check the ring producer/consumer pointers which can allow a guest to cause netback to loop for an extended period preventing other work from occurring.

CVE-2013-0217 is a memory leak on an error path which is guest triggerable.

Linux kernel is prone to a local privilege-escalation vulnerability due to a tmpfs use-after-free error. Local attackers can exploit the issue to execute arbitrary code with kernel privileges or to crash the kernel, effectively denying service to legitimate users (CVE-2013-1767).

Linux kernel built with Edgeport USB serial converter driver io_ti, is vulnerable to a NULL pointer dereference flaw. It happens if the device is disconnected while corresponding /dev/ttyUSB? file is in use. An unprivileged user could use this flaw to crash the system, resulting DoS (CVE-2013-1774).

The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to cause a denial of service (extended runtime of kernel code) by creating many different files whose names are associated with the same CRC32C hash value. (CVE-2012-5374)

The Linux kernel through 3.7.9 allows local users to obtain sensitive information about keystroke timing by using the inotify API on the /dev/ptmx device. (CVE-2013-0160)

An information leak was discovered in the Linux kernel's Bluetooth stack when HIDP (Human Interface Device Protocol) support is enabled. A local unprivileged user could exploit this flaw to cause an information leak from the kernel. (CVE-2013-0349)

A flaw was discovered on the Linux kernel's VFAT filesystem driver when a disk is mounted with the utf8 option (this is the default on Ubuntu). On a system where disks/images can be auto-mounted or a FAT filesystem is mounted an unprivileged user can exploit the flaw to gain root privileges. (CVE-2013-1773)

From the Red hat advisory:

A denial of service flaw was found in the way libxml2 performed string substitutions when entity values for entity references replacement was enabled. A remote attacker could provide a specially-crafted XML file that, when processed by an application linked against libxml2, would lead to excessive CPU consumption.

Agostino Sarubbo reported on the oss-security mailing list that, on Gentoo, /var/log/nginx is world-accessible and the log files inside the directory are world-readable. This could allow an unprivileged user to read the log files.

By carefully crafting an ACL entry an attacker may overflow fixed length buffers within the OpenAFS fileserver, crashing the fileserver, and potentially permitting the execution of arbitrary code. To perform the exploit, the attacker must already have permissions to create ACLs on the fileserver in question. Once such an ACL is present on a fileserver, client utilities such as 'fs' which manipulate ACLs, may be crashed when they attempt to read or modify the ACL.(CVE-2013-1794)

The ptserver accepts a list of unbounded size from the IdToName RPC. The length of this list is then used to determine the size of a number of other internal data structures. If the length is sufficiently large then we may hit an integer overflow when calculating the size to pass to malloc, and allocate data structures of insufficient length, allowing heap memory to be overwritten. This may allow an unauthenticated attacker to crash an OpenAFS ptserver. (CVE-2013-1795)

Unspecified vulnerability in the 2D component in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 15 and earlier, 6 Update 41 and earlier, and 5.0 Update 40 and earlier allows remote attackers to execute arbitrary code via unknown vectors, a different vulnerability than CVE-2013-1493. (CVE-2013-0809)

The color management (CMM) functionality in the 2D component in Oracle Java SE 7 Update 15 and earlier, 6 Update 41 and earlier, and 5.0 Update 40 and earlier allows remote attackers to execute arbitrary code or cause a denial of service (crash) via an image with crafted raster parameters, which triggers (1) an out-of-bounds read or (2) memory corruption in the JVM, as exploited in the wild in February 2013. (CVE-2013-1493)

A flaw was found in PackStack. During manifest creation, the manifest file was written to /tmp/ with a predictable file name. A local attacker could use this flaw to perform a symbolic link attack, overwriting an arbitrary file accessible to the user running PackStack with the contents of the manifest, which could lead to a denial of service. Additionally, the attacker could read and potentially modify the manifest being generated, allowing them to modify systems being deployed using OpenStack. (CVE-2013-0261)

It was discovered that the cinder.conf and all api-paste.ini configuration files were created with world-readable permissions. A local attacker could use this flaw to view administrative passwords, allowing them to control systems deployed and managed by OpenStack. (CVE-2013-0266)

PackageKit was fixed to add a patch to forbid update to downgrade (bnc#804983)

As the update operation is allowed for logged in regular users, they could install old package versions which might have been still affected by already fixed security problems.

From the Mandriva advisory:

PHP does not validate the configration directive soap.wsdl_cache_dir before writing SOAP wsdl cache files to the filesystem. Thus an attacker is able to write remote wsdl files to arbitrary locations (CVE-2013-1635).

PHP allows the use of external entities while parsing SOAP wsdl files which allows an attacker to read arbitrary files. If a web application unserializes user-supplied data and tries to execute any method of it, an attacker can send serialized SoapClient object initialized in non-wsdl mode which will make PHP to parse automatically remote XML-document specified in the location option parameter (CVE-2013-1643).

Unrestricted entity expansion can lead to a DoS vulnerability in REXML. (The CVE identifier will be assigned later.) We strongly recommend to upgrade ruby.

When reading text nodes from an XML document, the REXML parser can be coerced in to allocating extremely large string objects which can consume all of the memory on a machine, causing a denial of service.

Using a specially crafted request, an attacker could trick the database type conversion code to return incorrect records. For some token values this could allow an attacker to bypass the proper checks and gain control of other accounts.

From the Red Hat advisory:

It was found that ruby_parser from rubygem-ruby_parser created a temporary file in an insecure way. A local attacker could use this flaw to perform a symbolic link attack, overwriting arbitrary files accessible to the application using ruby_parser.

From the Ubuntu advisory:

Marco Schoepl discovered that Sudo incorrectly handled time stamp files when the system clock is set to epoch. A local attacker could use this issue to run Sudo commands without a password prompt.

Sudo before 1.8.6p7 allows a malicious user to run commands via sudo without authenticating, so long as there exists a terminal the user has access to where a sudo command was successfully run by that same user within the password timeout period (usually five minutes).

Fix a DOS attack (maybe more) by a bad Fedora mirror on repo. metadata.