Firefox 3.0.1 has been released and available for download. This update has been rated as having critical security impact by the Mozilla. Use the following instructions to upgrade Firefox.
Canonical Ltd has issued updates for its Kernel package to plug multiple security holes. A security issue affects all Ubuntu Linux versions.
Debian Linux project released today bug fixes for lighttpd and gaim package that allows remote attacks and DoS attacks.
An unpatched security hole in Ubuntu Linux 8.04 LTS operating system could be used by attackers to send a crafted packet and cause a denial of service via application crash in applications linked against OpenSSL to take control of vulnerable servers.
Multiple buffer overflows were discovered in the Ubuntu Linux kernel and can be corrected by upgrading your system to latest kernel version.
Updated freetype packages that fix various security issues are now available for CentOS / Red Hat Enterprise Linux 3, 4, 5 and 2.1 server software.
CVE-2008-0553: libtk-img – buffer overflow via local / remote arbitrary code execution.