1. Ubuntu Security Notices
  2. USN-614-1

USN-614-1: Linux kernel vulnerabilities

Publication date

3 June 2008

Overview

Linux kernel vulnerabilities

Releases

Packages

Details

It was discovered that PowerPC kernels did not correctly handle reporting
certain system details. By requesting a specific set of information,
a local attacker could cause a system crash resulting in a denial
of service. (CVE-2007-6694)

A race condition was discovered between dnotify fcntl() and close() in
the kernel. If a local attacker performed malicious dnotify requests,
they could cause memory consumption leading to a denial of service,
or possibly send arbitrary signals to any process. (CVE-2008-1375)

On SMP systems, a race condition existed in fcntl(). Local attackers
could perform malicious locks, causing system crashes and leading to
a denial of service. (CVE-2008-1669)

The tehuti network driver did not correctly handle certain IO functions.
A local attacker could perform malicious requests to the...

It was discovered that PowerPC kernels did not correctly handle reporting
certain system details. By requesting a specific set of information,
a local attacker could cause a system crash resulting in a denial
of service. (CVE-2007-6694)

A race condition was discovered between dnotify fcntl() and close() in
the kernel. If a local attacker performed malicious dnotify requests,
they could cause memory consumption leading to a denial of service,
or possibly send arbitrary signals to any process. (CVE-2008-1375)

On SMP systems, a race condition existed in fcntl(). Local attackers
could perform malicious locks, causing system crashes and leading to
a denial of service. (CVE-2008-1669)

The tehuti network driver did not correctly handle certain IO functions.
A local attacker could perform malicious requests to the driver,
potentially accessing kernel memory, leading to privilege escalation
or access to private system information. (CVE-2008-1675)

Update instructions

After a standard system upgrade you need to reboot your computer to effect the necessary changes.

Learn more about how to get the fixes.

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-386, linux-powerpc, linux-amd64-generic), a standard system upgrade will automatically perform this as well.

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

Ubuntu Release Package Version
8.04 hardy linux-image-2.6.24-18-lpiacompat –  2.6.24-18.32
linux-image-2.6.24-18-hppa32 –  2.6.24-18.32
linux-image-2.6.24-18-sparc64-smp –  2.6.24-18.32
linux-image-2.6.24-18-xen –  2.6.24-18.32
linux-image-2.6.24-18-powerpc-smp –  2.6.24-18.32
linux-image-2.6.24-18-hppa64 –  2.6.24-18.32
linux-image-2.6.24-18-powerpc64-smp –  2.6.24-18.32
linux-image-2.6.24-18-openvz –  2.6.24-18.32
linux-image-2.6.24-18-virtual –  2.6.24-18.32
linux-image-2.6.24-18-rt –  2.6.24-18.32
linux-image-2.6.24-18-generic –  2.6.24-18.32
linux-image-2.6.24-18-lpia –  2.6.24-18.32
linux-image-2.6.24-18-powerpc –  2.6.24-18.32
linux-image-2.6.24-18-mckinley –  2.6.24-18.32
linux-image-2.6.24-18-sparc64 –  2.6.24-18.32
linux-image-2.6.24-18-server –  2.6.24-18.32
linux-image-2.6.24-18-386 –  2.6.24-18.32
linux-image-2.6.24-18-itanium –  2.6.24-18.32

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References

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