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Ubuntu 8.04 LTS: USN-1268-1 Moderate: Kernel Authentication Flaws

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Calendar Grey November 21, 2011
Scroller Ubuntu
Ubuntu security advisory USN-1268-1 details critical kernel vulnerabilities affecting system integrity and data security. Upgrade your kernel soon for protection
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

It was discovered that CIFS incorrectly handled authentication. When a user

had a CIFS share mounted that required authentication, a local user could

mount the same share without knowing the correct password. (CVE-2011-1585)

It was discovered that the GRE protocol incorrectly handled netns

initialization. A remote attacker could send a packet while the ip_gre

module was loading, and crash the system, leading to a denial of service.

(CVE-2011-1767)

It was discovered that the IP/IP protocol incorrectly handled netns

initialization. A remote attacker could send a packet while the ipip module

was loading, and crash the system, leading to a denial of service.

(CVE-2011-1768)

Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly

handled unlock requests. A local attacker could exploit this to cause a

denial of service. (CVE-2011-2491)

Rober...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service security issue Ubuntu kernel system update authentication flaw

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 8.04 LTS:
  linux-image-2.6.24-30-386       2.6.24-30.96
  linux-image-2.6.24-30-generic   2.6.24-30.96
  linux-image-2.6.24-30-hppa32    2.6.24-30.96
  linux-image-2.6.24-30-hppa64    2.6.24-30.96
  linux-image-2.6.24-30-itanium   2.6.24-30.96
  linux-image-2.6.24-30-lpia      2.6.24-30.96
  linux-image-2.6.24-30-lpiacompat  2.6.24-30.96
  linux-image-2.6.24-30-mckinley  2.6.24-30.96
  linux-image-2.6.24-30-openvz    2.6.24-30.96
  linux-image-2.6.24-30-powerpc   2.6.24-30.96
  linux-image-2.6.24-30-powerpc-smp  2.6.24-30.96
  linux-image-2.6.24-30-powerpc64-smp  2.6.24-30.96
  linux-image-2.6.24-30-rt        2.6.24-30.96
  linux-image-2.6.24-30-server    2.6.24-30.96
  linux-image-2.6.24-30-sparc64   2.6.24-30.96
  linux-image-2.6.24-30-sparc64-smp  2.6.24-30.96
  linux-image-2.6.24-30-virtual   2.6.24-30.96
  linux-image-2.6.24-30-xen       2.6.24-30.96

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

https://ubuntu.com/security/notices/USN-1268-1

CVE-2011-1585, CVE-2011-1767, CVE-2011-1768, CVE-2011-2491,

CVE-2011-2496, CVE-2011-2525, CVE-2011-3209

November 21, 2011

Topics%20covered

Topics Covered

security advisory denial of service security issue Ubuntu kernel system update authentication flaw

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.24-30.96

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