Issued:
2011-03-10
Updated:
2011-03-10

RHSA-2011:0330 - Important: kernel-rt security and bug fix update

Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory Important

Topic

Updated kernel-rt packages that fix multiple security issues and three bugs are now available for Red Hat Enterprise MRG 1.3.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Description

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

Security fixes:

  • Missing boundary checks in the PPP over L2TP sockets implementation could allow a local, unprivileged user to cause a denial of service or escalate their privileges. (CVE-2010-4160, Important)

  • Integer overflow in ib_uverbs_poll_cq() could allow a local, unprivileged user to cause a denial of service or escalate their privileges. (CVE-2010-4649, Important)

  • Missing boundary check in dvb_ca_ioctl() in the av7110 module. On systems using old DVB cards requiring the av7110 module, a local, unprivileged user could use this flaw to cause a denial of service or escalate their privileges. (CVE-2011-0521, Important)

  • Flaw in tcf_act_police_dump() in the network traffic policing implementation could allow a local, unprivileged user to cause an information leak. (CVE-2010-3477, Moderate)

  • Missing boundary checks in the block layer implementation could allow a local, unprivileged user to cause a denial of service. (CVE-2010-4162, CVE-2010-4163, CVE-2010-4668, Moderate)

  • Divide-by-zero flaw in tcp_select_initial_window() in the Linux kernel's TCP/IP protocol suite implementation could allow a local, unprivileged user to cause a denial of service. (CVE-2010-4165, Moderate)

  • NULL pointer dereference flaw in the Bluetooth HCI UART driver could allow a local, unprivileged user to cause a denial of service. (CVE-2010-4242, Moderate)

  • Flaw in the CPU time clocks implementation for the POSIX clock interface could allow a local, unprivileged user to cause a denial of service. (CVE-2010-4248, Moderate)

  • Flaw in the garbage collector for AF_UNIX sockets could allow a local, unprivileged user to trigger a denial of service (out-of-memory condition). (CVE-2010-4249, Moderate)

  • Memory leak in the inotify_init() system call. In some cases, it could leak a group, which could allow a local, unprivileged user to eventually cause a denial of service. (CVE-2010-4250, Moderate)

  • /sys/kernel/debug/acpi/custom_method had world-writable permissions, which could allow a local, unprivileged user to escalate their privileges. Note: The debugfs file system must be mounted locally to exploit this issue. It is not mounted by default. (CVE-2010-4347, Moderate)

  • Heap overflow in iowarrior_write() could allow a user with access to an IO-Warrior USB device to cause a denial of service or escalate their privileges. (CVE-2010-4656, Moderate)

  • Missing security check in the Linux kernel's implementation of the install_special_mapping routine could allow a local, unprivileged user to bypass the mmap_min_addr protection mechanism. (CVE-2010-4346, Low)

  • Information leak in bcm_connect() in the Controller Area Network (CAN) Broadcast Manager implementation could allow a local, unprivileged user to leak kernel mode addresses in /proc/net/can-bcm. (CVE-2010-4565, Low)

  • A logic error in orinoco_ioctl_set_auth() in the Linux kernel's ORiNOCO wireless extensions support implementation could render TKIP countermeasures ineffective when it is enabled, as it enabled the card instead of shutting it down. (CVE-2010-4648, Low)

  • Missing initialization flaw in ethtool_get_regs() could allow a local user who has the CAP_NET_ADMIN capability to cause an information leak. (CVE-2010-4655, Low)

  • Flaw in ib_uverbs_poll_cq() could allow a local, unprivileged user to cause an information leak. (CVE-2011-1044, Low)

Red Hat would like to thank Dan Rosenberg for reporting CVE-2010-4160, CVE-2010-4162, CVE-2010-4163, CVE-2010-4668, and CVE-2010-4565; Steve Chen for reporting CVE-2010-4165; Alan Cox for reporting CVE-2010-4242; Vegard Nossum for reporting CVE-2010-4249 and CVE-2010-4250; Kees Cook for reporting CVE-2010-4656 and CVE-2010-4655; and Tavis Ormandy for reporting CVE-2010-4346.

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

Solution

Users should upgrade to these updated kernel-rt packages. They are based on upstream version 2.6.33.7.2-rt30 (despite package naming) and correct these issues. The system must be rebooted for this update to take effect.

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.https://access.redhat.com/kb/docs/DOC-11259

To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system.

Affected Products

ProductVersionArch
MRG Realtime1x86_64
MRG Realtime1i386

Updated Packages

  • kernel-rt-2.6.33.7-rt29.55.el5rt.i686.rpm
  • kernel-rt-trace-devel-2.6.33.7-rt29.55.el5rt.i686.rpm
  • kernel-rt-doc-2.6.33.7-rt29.55.el5rt.noarch.rpm
  • kernel-rt-trace-devel-2.6.33.7-rt29.55.el5rt.x86_64.rpm
  • kernel-rt-debug-devel-2.6.33.7-rt29.55.el5rt.i686.rpm
  • kernel-rt-devel-2.6.33.7-rt29.55.el5rt.x86_64.rpm
  • kernel-rt-devel-2.6.33.7-rt29.55.el5rt.i686.rpm
  • kernel-rt-trace-2.6.33.7-rt29.55.el5rt.x86_64.rpm
  • kernel-rt-trace-2.6.33.7-rt29.55.el5rt.i686.rpm
  • kernel-rt-vanilla-2.6.33.7-rt29.55.el5rt.x86_64.rpm
  • kernel-rt-debug-devel-2.6.33.7-rt29.55.el5rt.x86_64.rpm
  • kernel-rt-2.6.33.7-rt29.55.el5rt.x86_64.rpm
  • kernel-rt-vanilla-devel-2.6.33.7-rt29.55.el5rt.i686.rpm
  • kernel-rt-vanilla-2.6.33.7-rt29.55.el5rt.i686.rpm
  • kernel-rt-debug-2.6.33.7-rt29.55.el5rt.i686.rpm
  • perf-2.6.33.7-rt29.55.el5rt.x86_64.rpm
  • perf-2.6.33.7-rt29.55.el5rt.i686.rpm
  • kernel-rt-debug-2.6.33.7-rt29.55.el5rt.x86_64.rpm
  • kernel-rt-vanilla-devel-2.6.33.7-rt29.55.el5rt.x86_64.rpm

Fixes

CVEs

References

Additional information