kernel security update

2011-04-14T19:48:06
ID CESA-2011:0303
Type centos
Reporter CentOS Project
Modified 2011-04-14T19:48:06

Description

CentOS Errata and Security Advisory CESA-2011:0303

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues:

  • A flaw was found in the Linux kernel's garbage collector for AF_UNIX sockets. A local, unprivileged user could use this flaw to trigger a denial of service (out-of-memory condition). (CVE-2010-4249, Moderate)

  • A flaw was found in the Linux kernel's networking subsystem. If the number of packets received exceeded the receiver's buffer limit, they were queued in a backlog, consuming memory, instead of being discarded. A remote attacker could abuse this flaw to cause a denial of service (out-of-memory condition). (CVE-2010-4251, Moderate)

  • A missing initialization flaw was found in the ethtool_get_regs() function in the Linux kernel's ethtool IOCTL handler. A local user who has the CAP_NET_ADMIN capability could use this flaw to cause an information leak. (CVE-2010-4655, Low)

Red Hat would like to thank Vegard Nossum for reporting CVE-2010-4249, and Kees Cook for reporting CVE-2010-4655.

This update also fixes several bugs. Documentation for these bug fixes will be available shortly from the Technical Notes document linked to in the References section.

Users should upgrade to these updated packages, which contain backported patches to correct these issues, and fix the bugs noted in the Technical Notes. The system must be rebooted for this update to take effect.

Merged security bulletin from advisories: http://lists.centos.org/pipermail/centos-announce/2011-April/017348.html http://lists.centos.org/pipermail/centos-announce/2011-April/017349.html

Affected packages: kernel kernel-PAE kernel-PAE-devel kernel-debug kernel-debug-devel kernel-devel kernel-doc kernel-headers kernel-xen kernel-xen-devel

Upstream details at: https://rhn.redhat.com/errata/RHSA-2011-0303.html