USN-509-1: Linux kernel vulnerabilities

30 August 2007

Linux kernel vulnerabilities

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Releases

Packages

Details

A flaw in the sysfs_readdir function allowed a local user to cause a
denial of service by dereferencing a NULL pointer. (CVE-2007-3104)

A buffer overflow was discovered in the random number generator. In
environments with granular assignment of root privileges, a local attacker
could gain additional privileges. (CVE-2007-3105)

A flaw was discovered in the usblcd driver. A local attacker could cause
large amounts of kernel memory consumption, leading to a denial of service.
(CVE-2007-3513)

It was discovered that certain setuid-root processes did not correctly
reset process death signal handlers. A local user could manipulate this
to send signals to processes they would not normally have access to.
(CVE-2007-3848)

The Direct Rendering Manager for the i915 driver could be made to write
to arbitrary memory locations. An attacker with access to a running X11
session could send a specially crafted buffer and gain root privileges.
(CVE-2007-3851)

It was discovered that the aacraid SCSI driver did not correctly check
permissions on certain ioctls. A local attacker could cause a denial
of service or gain privileges. (CVE-2007-4308)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 6.10

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

References

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