USN-509-1: Linux kernel vulnerabilities

30 August 2007

linux-source-2.6.17 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 6.10

Software Description

  • linux-source-2.6.17

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)

Update instructions

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

Ubuntu 6.10
linux-image-2.6.17-12-386 - 2.6.17.1-12.40
linux-image-2.6.17-12-generic - 2.6.17.1-12.40
linux-image-2.6.17-12-hppa32 - 2.6.17.1-12.40
linux-image-2.6.17-12-hppa64 - 2.6.17.1-12.40
linux-image-2.6.17-12-itanium - 2.6.17.1-12.40
linux-image-2.6.17-12-mckinley - 2.6.17.1-12.40
linux-image-2.6.17-12-powerpc - 2.6.17.1-12.40
linux-image-2.6.17-12-powerpc-smp - 2.6.17.1-12.40
linux-image-2.6.17-12-powerpc64-smp - 2.6.17.1-12.40
linux-image-2.6.17-12-server - 2.6.17.1-12.40
linux-image-2.6.17-12-server-bigiron - 2.6.17.1-12.40
linux-image-2.6.17-12-sparc64 - 2.6.17.1-12.40
linux-image-2.6.17-12-sparc64-smp - 2.6.17.1-12.40

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References