Thank you for reading the Linux Advisory Watch Security Newsletter. The purpose of this document is to provide our readers with a quick summary of each week's vendor security bulletins and pointers on methods to improve the security posture of your open source system. Vulnerabilities affect nearly every vendor virtually every week, so be sure to read through to find the updates your distributor have made available.

LinuxSecurity.com Feature Extras:

What You Need to Know About Linux Rootkits - Rootkits are a way attackers hide their tracks and keep access to the machines they control. The good rootkits are very hard to detect and remove. They can be running on ones computer and no one can even know they have been running. Read more to learn how to detect them on your system.

Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition - Mark Sobell again delivers the answers to common Linux administration challenges, and provides thorough and step-by-step instructions to configuring many of the common Linux Internet services in A Practical Guide to Fedora and Red Hat Enterprise Linux, Fifth Edition.

(Sep 13)

Several fraudulent SSL certificates have been found in the wild issued by the DigiNotar Certificate Authority, obtained through a security compromise of said company. After further updates on this incident, it has been determined that all of DigiNotar's signing certificates can no [More...]
(Sep 12)

Several vulnerabilities were found in Mantis, a web-based bug tracking system: Insufficient input validation could result in local file inclusion and cross-site scripting. [More...]
(Sep 11)

Ben Hawkes discovered that squid3, a full featured Web Proxy cache (HTTP proxy), is vulnerable to a buffer overflow when processing gopher server replies. An attacker can exploit this flaw by connecting to a gopher server that returns lines longer than 4096 bytes. This may result [More...]
(Sep 11)

Several vulnerabilities were discovered in the Chromium browser. The Common Vulnerabilities and Exposures project identifies the following problems: [More...]
(Sep 11)

Several vulnerabilities have been discovered in ffmpeg, a multimedia player, server and encoder. The Common Vulnerabilities and Exposures project identifies the following [More...]
(Sep 10)

The linux-2.6 and user-mode-linux upgrades from DSA-2303-1 has caused a regression that can result in an oops during invalid accesses to /proc//maps files. [More...]
Mandriva: 2011:134-1: rsyslog (Sep 17)

A vulnerability was discovered and corrected in rsyslog: Stack-based buffer overflow in the parseLegacySyslogMsg function in tools/syslogd.c in rsyslogd in rsyslog 4.6.x before 4.6.8 and 5.2.0 through 5.8.4 might allow remote attackers to cause a denial of [More...]
Mandriva: 2011:132-1: pidgin (Sep 17)

Multiple vulnerabilities has been identified and fixed in pidgin: It was found that the gdk-pixbuf GIF image loader routine gdk_pixbuf__gif_image_load() did not properly handle certain return values from its subroutines. A remote attacker could provide a [More...]
Mandriva: 2011:130-1: apache (Sep 17)

Multiple vulnerabilities has been discovered and corrected in apache: The byterange filter in the Apache HTTP Server 1.3.x, 2.0.x through 2.0.64, and 2.2.x through 2.2.19 allows remote attackers to cause a denial of service (memory and CPU consumption) via a Range header [More...]
Mandriva: 2011:134: rsyslog (Sep 9)

A vulnerability was discovered and corrected in rsyslog: Stack-based buffer overflow in the parseLegacySyslogMsg function in tools/syslogd.c in rsyslogd in rsyslog 4.6.x before 4.6.8 and 5.2.0 through 5.8.4 might allow remote attackers to cause a denial of [More...]
Red Hat: 2011:1300-01: httpd: Important Advisory (Sep 15)

Updated httpd packages that fix one security issue are now available for Red Hat Enterprise Linux 3 Extended Life Cycle Support. The Red Hat Security Response Team has rated this update as having [More...]
Red Hat: 2011:1294-01: httpd: Important Advisory (Sep 14)

Updated httpd packages that fix one security issue are now available for Red Hat Enterprise Linux 5.3 Long Life, 5.6 Extended Update Support, and 6.0 Extended Update Support. [More...]
Red Hat: 2011:1293-01: squid: Moderate Advisory (Sep 14)

An updated squid package that fixes one security issue is now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate [More...]
Red Hat: 2011:1289-01: librsvg2: Moderate Advisory (Sep 13)

Updated librsvg2 packages that fix one security issue are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate [More...]
Red Hat: 2011:1253-01: kernel-rt: Important Advisory (Sep 12)

Updated kernel-rt packages that fix multiple security issues and various bugs are now available for Red Hat Enterprise MRG 2.0. The Red Hat Security Response Team has rated this update as having [More...]
Red Hat: 2011:1282-01: nss and nspr: Important Advisory (Sep 12)

Updated nss and nspr packages that fix one security issue are now available for Red Hat Enterprise Linux 4, 5, and 6. The Red Hat Security Response Team has rated this update as having [More...]
(Sep 9)

Not long ago, httpd package updates were issued to clamp down on a denial of service bug that's seen some action in the wild. New packages are available for Slackware 12.0, 12.1, 12.2, 13.0, 13.1, 13.37, and -current. [More Info...]
Ubuntu: 1208-1: Linux kernel (Marvel DOVE) vulnerabilities (Sep 14)

Multiple kernel flaws have been fixed.
Ubuntu: 1207-1: CUPS vulnerabilities (Sep 14)

An attacker could send crafted print jobs to CUPS and cause it to crash orrun programs.
Ubuntu: 1204-1: Linux kernel (i.MX51) vulnerabilities (Sep 13)

Multiple kernel flaws have been fixed.
Ubuntu: 1203-1: Linux kernel (Marvel DOVE) vulnerabilities (Sep 13)

Multiple kernel flaws have been fixed.
Ubuntu: 1201-1: Linux kernel vulnerabilities (Sep 13)

Multiple kernel flaws have been fixed.
Ubuntu: 1202-1: Linux kernel (OMAP4) vulnerabilities (Sep 13)

Multiple kernel flaws have been fixed.
Ubuntu: 1200-1: Quassel vulnerability (Sep 10)

A remote attacker could send crafted input to Quassel and cause it tocrash.
Ubuntu: 1197-5: CA Certificates vulnerability (Sep 9)

A certificate authority mis-issued fraudulent certificates.