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:

Securing a Linux Web Server - With the significant prevalence of Linux web servers globally, security is often touted as a strength of the platform for such a purpose. However, a Linux based web server is only as secure as its configuration and very often many are quite vulnerable to compromise. While specific configurations vary wildly due to environments or specific use, there are various general steps that can be taken to insure basic security considerations are in place.

Password guessing with Medusa 2.0 - Medusa was created by the fine folks at foofus.net, in fact the much awaited Medusa 2.0 update was released in February of 2010. For a complete change log please visit

(Jul 10)

Multiple vulnerabilities were discovered in the poppler PDF rendering library. CVE-2013-1788 [More...]
(Jul 7)

A buffer overflow has been identified in nginx, a small, powerful, scalable web/proxy server, when processing certain chunked transfer encoding requests if proxy_pass to untrusted upstream HTTP servers is used. An attacker may use this flaw to perform denial of service [More...]
(Jul 6)

Multiple security issues have been found in Icedove, Debian's version of the Mozilla Thunderbird mail and news client. Multiple memory safety errors, use-after-free vulnerabilities, missing permission checks, incorrect memory handling and other implementaton errors may lead to the execution [More...]
(Jul 11)

Multiple vulnerabilities have been found in HAProxy, allowing attackers to execute arbitrary code or cause Denial of Service.
Mandriva: 2013:194: kernel (Jul 11)

Multiple vulnerabilities has been found and corrected in the Linux kernel: net/ceph/auth_none.c in the Linux kernel through 3.10 allows remote attackers to cause a denial of service (NULL pointer dereference [More...]
Mandriva: 2013:193: apache (Jul 11)

A vulnerability has been found and corrected in apache (ASF HTTPD): mod_dav.c in the Apache HTTP Server before 2.2.25 does not properly determine whether DAV is enabled for a URI, which allows remote attackers to cause a denial of service (segmentation fault) via a [More...]
Red Hat: 2013:1035-01: flash-plugin: Critical Advisory (Jul 10)

An updated Adobe Flash Player package that fixes three security issues is now available for Red Hat Enterprise Linux 5 and 6 Supplementary. The Red Hat Security Response Team has rated this update as having critical [More...]
Red Hat: 2013:1034-01: kernel: Low Advisory (Jul 10)

Updated kernel packages that fix multiple security issues and various bugs are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low [More...]
Red Hat: 2013:1026-01: kernel: Important Advisory (Jul 9)

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6.2 Extended Update Support. The Red Hat Security Response Team has rated this update as having [More...]
(Jul 10)

New dbus packages are available for Slackware 14.0, and -current to fix a security issue. [More Info...]
Ubuntu: 1902-1: Ruby vulnerability (Jul 9)

An attacker could trick Ruby into trusting a rogue server.
Ubuntu: 1901-1: Raptor vulnerability (Jul 8)

Applications using Raptor could be made to expose sensitive information orrun programs as your login if they opened a specially crafted file.
Ubuntu: 1900-1: Linux kernel (EC2) vulnerabilities (Jul 4)

Several security issues were fixed in the kernel.
Ubuntu: 1899-1: Linux kernel vulnerabilities (Jul 4)

Several security issues were fixed in the kernel.