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:

Using the sec-wall Security Proxy - This article full of examples will show you various ways to test services secured using sec-wall, a feature-packed high performance security proxy. We'll be using cURL, a popular Linux command line tool and PycURL - a Python interface to cURL. As of version 1.0, sec-wall supports HTTP Basic auth, digest auth, custom HTTP headers, XPath-based authentication, WS-Security & SSL/TLS client certificates and each of the options is being shown below.

sec-wall: Open Source Security Proxy - sec-wall, a recently released security proxy is a one-stop place for everything related to securing HTTP/HTTPS traffic. Designed as a pragmatic solution to the question of securing servers using SSL/TLS certificates, WS-Security, HTTP Basic/Digest Auth, custom HTTP headers, XPath expressions with an option of modifying HTTP headers and URLs on the fly.

Guardian Digital is happy to announce the release of EnGarde Secure Community 3.0.22 (Version 3.0, Release 22). This release includes many updated packages and bug fixes and some feature enhancements to the EnGarde Secure Linux Installer and the SELinux policy.
(Jun 10)

Rocco Calvi discovered that the XSPF playlist parser of vlc, a multimedia player and streamer, is prone to an integer overflow resulting in a heap-based buffer overflow. This might allow an attacker to execute arbitrary code by tricking a victim into opening a specially crafted [More...]
(Jun 9)

Tavis Ormandy discovered that the Tag Image File Format (TIFF) library is vulnerable to a buffer overflow triggered by a crafted OJPEG file which allows for a crash and potentially execution of arbitrary code. [More...]
(Jun 6)

Chris Evans discovered that libxml was vulnerable to buffer overflows, which allowed a crafted XML input file to potentially execute arbitrary code. [More...]
(Jun 4)

OProfile is a performance profiling tool which is configurable by opcontrol, its control utility. Stephane Chauveau reported several ways to inject arbitrary commands in the arguments of this utility. If a local unprivileged user is authorized by sudoers file to run opcontrol as root, this user could use the [More...]
(Jun 3)

Ulrik Persson reported a stack-based buffer overflow flaw in FontForge, a font editor. When processed a crafted Bitmap Distribution Format (BDF) FontForge could crash or execute arbitrary code with the privileges of the user running FontForge. [More...]
(Jun 2)

It was discovered that the message header parser in the Dovecot mail server parsed NUL characters incorrectly, which could lead to denial of service through malformed mail headers. [More...]
(Jun 2)

Several vulnerabilities were discovered in Subversion, the version control system. The Common Vulnerabilities and Exposures project identifies the following problems: [More...]
Mandriva: 2011:107: fetchmail (Jun 7)

Multiple vulnerabilities were discovered and corrected in fetchmail: fetchmail 4.6.3 through 6.3.16, when debug mode is enabled, does not properly handle invalid characters in a multi-character locale, which allows remote attackers to cause a denial of service (memory [More...]
Mandriva: 2011:106: subversion (Jun 4)

Multiple vulnerabilities were discovered and corrected in subversion: The mod_dav_svn Apache HTTPD server module will dereference a NULL pointer if asked to deliver baselined WebDAV resources which can lead to a DoS (Denial Of Service) (CVE-2011-1752). [More...]
Red Hat: 2011:0862-01: subversion: Moderate Advisory (Jun 8)

Updated subversion packages that fix three security issues are now available for Red Hat Enterprise Linux 5 and 6. The Red Hat Security Response Team has rated this update as having moderate [More...]
Red Hat: 2011:0861-01: subversion: Moderate Advisory (Jun 8)

Updated subversion packages that fix one security issue are now available for Red Hat Enterprise Linux 4. The Red Hat Security Response Team has rated this update as having moderate [More...]
Red Hat: 2011:0860-01: java-1.6.0-sun: Critical Advisory (Jun 8)

Updated java-1.6.0-sun packages that fix several security issues are now available for Red Hat Enterprise Linux 4 Extras, and Red Hat Enterprise Linux 5 and 6 Supplementary. [More...]
Red Hat: 2011:0859-01: cyrus-imapd: Moderate Advisory (Jun 8)

Updated cyrus-imapd 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 moderate [More...]
Red Hat: 2011:0857-01: java-1.6.0-openjdk: Important Advisory (Jun 8)

Updated java-1.6.0-openjdk packages that fix several security issues are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having [More...]
Red Hat: 2011:0858-01: xerces-j2: Moderate Advisory (Jun 8)

Updated xerces-j2 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: 2011:0856-01: java-1.6.0-openjdk: Critical Advisory (Jun 8)

Updated java-1.6.0-openjdk packages that fix several security issues are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having critical [More...]
Red Hat: 2011:0850-01: flash-plugin: Important Advisory (Jun 6)

An updated Adobe Flash Player package that fixes one security issue is now available for Red Hat Enterprise Linux 5 and 6 Supplementary. The Red Hat Security Response Team has rated this update as having [More...]
Ubuntu: 1145-1: QEMU vulnerabilities (Jun 10)

A privileged attacker within a QEMU guest could cause QEMU to crash.
Ubuntu: 1146-1: Linux kernel vulnerabilities (Jun 9)

Multiple flaws fixed in the Linux kernel.
Ubuntu: 1122-3: Thunderbird regression (Jun 6)

An empty menu bar sometimes appeared after upgrade in USN-1122-2
Ubuntu: 1144-1: Subversion vulnerabilities (Jun 6)

An attacker could send crafted input to the Subversion mod_dav_svn modulefor Apache and cause it to crash or gain access to restricted files.