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Ubuntu 10.04 LTS USN-1203-1 Critical: Kernel Denial Of Service Fixes

ubuntu
Calendar Grey September 13, 2011
Scroller Ubuntu
Numerous kernel vulnerabilities in Ubuntu resolved to strengthen security and mitigate memory exploitation and service interruption threats.
Multiple kernel flaws have been fixed.

Summary

Multiple kernel flaws have been fixed.

Software Description:

- linux-mvl-dove: Linux kernel for DOVE

Details:

Dan Rosenberg discovered that multiple terminal ioctls did not correctly

initialize structure memory. A local attacker could exploit this to read

portions of kernel stack memory, leading to a loss of privacy.

(CVE-2010-4076, CVE-2010-4077)

Alex Shi and Eric Dumazet discovered that the network stack did not

correctly handle packet backlogs. A remote attacker could exploit this by

sending a large amount of network traffic to cause the system to run out of

memory, leading to a denial of service. (CVE-2010-4251, CVE-2010-4805)

It was discovered that the /proc filesystem did not correctly handle

permission changes when programs executed. A local attacker could hold open

files to examine details about programs running with higher privileges,

potentially increasing the chances of exploiting additional

vulnerabilities. (CVE-2011-1020)

Dan Rosenberg discovered that the X.25 Ro...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service security issue kernel fix ubuntu memory attack

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-218-dove     2.6.32-218.36

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-1203-1

CVE-2010-4076, CVE-2010-4077, CVE-2010-4251, CVE-2010-4805,

CVE-2011-1020, CVE-2011-1493, CVE-2011-1577, CVE-2011-2213,

CVE-2011-2484, CVE-2011-2492, CVE-2011-2700, CVE-2011-2723,

CVE-2011-2918

Severity
critical
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Low
Medium
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Critical

September 13, 2011

Topics%20covered

Topics Covered

security advisory denial of service security issue kernel fix ubuntu memory attack

Package Information

https://launchpad.net/ubuntu/+source/linux-mvl-dove/2.6.32-218.36

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