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Ubuntu 10.04 LTS USN-1386-1 Critical: Kernel Flaws Causing DoS

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Calendar Grey March 6, 2012
Scroller Ubuntu
Security vulnerabilities in the kernel have been fixed in Ubuntu 10.04 LTS, ensure these are managed with the latest packages to enhance system reliability.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-backport-natty: Linux kernel backport from Natty

Details:

The linux kernel did not properly account for PTE pages when deciding which

task to kill in out of memory conditions. A local, unprivileged could

exploit this flaw to cause a denial of service. (CVE-2011-2498)

A flaw was discovered in the TOMOYO LSM's handling of mount system calls.

An unprivileged user could oops the system causing a denial of service.

(CVE-2011-2518)

Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user

who can mount a FUSE file system could cause a denial of service.

(CVE-2011-3353)

A bug was discovered in the Linux kernel's calculation of OOM (Out of

memory) scores, that would result in the wrong process being killed. A user

could use this to kill the process with the highest OOM score, even if that

process belongs to another user or the system. (CVE-2011-4097)

A flaw was...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service system update kernel flaw ubuntu out of memory linux-lts-backport

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.38-13-generic   2.6.38-13.56~lucid1
  linux-image-2.6.38-13-generic-pae  2.6.38-13.56~lucid1
  linux-image-2.6.38-13-server    2.6.38-13.56~lucid1
  linux-image-2.6.38-13-virtual   2.6.38-13.56~lucid1

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-1386-1

CVE-2011-2498, CVE-2011-2518, CVE-2011-3353, CVE-2011-4097,

CVE-2011-4622, CVE-2012-0038, CVE-2012-0044, CVE-2012-0207

Severity
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Critical

March 06, 2012

Topics%20covered

Topics Covered

security advisory denial of service system update kernel flaw ubuntu out of memory linux-lts-backport

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-backport-natty/2.6.38-13.56~lucid1

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