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USN-137-1: Linux kernel vulnerabilities

8 June 2005

Linux kernel vulnerabilities

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Releases

Details

Alexander Nyberg discovered that ptrace() insufficiently validated
addresses on the amd64 platform so that it was possible to set an
invalid segment base. A local attacker could exploit this to crash the
kernel. This does not affect the i386 and powerpc platforms in any
way. (CAN-2005-0756)

Chris Wright discovered that the mmap() function could create illegal
memory maps (using the "mmap" function) with the start address
pointing beyond the end address. A local user could exploit this to
crash the kernel or possibly even execute arbitrary code with kernel
privileges. (CAN-2005-1265)

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 5.04
  • linux-patch-ubuntu-2.6.10 -
  • linux-image-2.6.8.1-5-powerpc-smp -
  • linux-image-2.6.8.1-5-power4-smp -
  • linux-image-2.6.10-5-386 -
  • linux-image-2.6.10-5-itanium-smp -
  • linux-image-2.6.10-5-power4 -
  • linux-image-2.6.10-5-amd64-k8 -
  • linux-image-2.6.10-5-amd64-xeon -
  • linux-image-2.6.10-5-mckinley-smp -
  • linux-image-2.6.10-5-power4-smp -
  • linux-image-2.6.8.1-5-amd64-generic -
  • linux-image-2.6.10-5-amd64-k8-smp -
  • linux-image-2.6.8.1-5-k7-smp -
  • linux-image-2.6.8.1-5-power3-smp -
  • linux-image-2.6.8.1-5-amd64-xeon -
  • linux-image-2.6.10-5-powerpc-smp -
  • linux-image-2.6.8.1-5-power3 -
  • linux-image-2.6.8.1-5-power4 -
  • linux-image-2.6.8.1-5-powerpc -
  • linux-image-2.6.10-5-mckinley -
  • linux-image-2.6.10-5-itanium -
  • linux-image-2.6.10-5-power3-smp -
  • linux-image-2.6.10-5-k7 -
  • linux-image-2.6.10-5-power3 -
  • linux-image-2.6.8.1-5-amd64-k8-smp -
  • linux-image-2.6.8.1-5-686 -
  • linux-image-2.6.8.1-5-686-smp -
  • linux-patch-debian-2.6.8.1 -
  • linux-image-2.6.10-5-powerpc -
  • linux-image-2.6.8.1-5-k7 -
  • linux-image-2.6.10-5-k7-smp -
  • linux-image-2.6.10-5-amd64-generic -
  • linux-image-2.6.10-5-686-smp -
  • linux-image-2.6.8.1-5-386 -
  • linux-image-2.6.10-5-686 -
  • linux-image-2.6.8.1-5-amd64-k8 -
Ubuntu 4.10
  • linux-patch-ubuntu-2.6.10 -
  • linux-image-2.6.8.1-5-powerpc-smp -
  • linux-image-2.6.8.1-5-power4-smp -
  • linux-image-2.6.10-5-386 -
  • linux-image-2.6.10-5-itanium-smp -
  • linux-image-2.6.10-5-power4 -
  • linux-image-2.6.10-5-amd64-k8 -
  • linux-image-2.6.10-5-amd64-xeon -
  • linux-image-2.6.10-5-mckinley-smp -
  • linux-image-2.6.10-5-power4-smp -
  • linux-image-2.6.8.1-5-amd64-generic -
  • linux-image-2.6.10-5-amd64-k8-smp -
  • linux-image-2.6.8.1-5-k7-smp -
  • linux-image-2.6.8.1-5-power3-smp -
  • linux-image-2.6.8.1-5-amd64-xeon -
  • linux-image-2.6.10-5-powerpc-smp -
  • linux-image-2.6.8.1-5-power3 -
  • linux-image-2.6.8.1-5-power4 -
  • linux-image-2.6.8.1-5-powerpc -
  • linux-image-2.6.10-5-mckinley -
  • linux-image-2.6.10-5-itanium -
  • linux-image-2.6.10-5-power3-smp -
  • linux-image-2.6.10-5-k7 -
  • linux-image-2.6.10-5-power3 -
  • linux-image-2.6.8.1-5-amd64-k8-smp -
  • linux-image-2.6.8.1-5-686 -
  • linux-image-2.6.8.1-5-686-smp -
  • linux-patch-debian-2.6.8.1 -
  • linux-image-2.6.10-5-powerpc -
  • linux-image-2.6.8.1-5-k7 -
  • linux-image-2.6.10-5-k7-smp -
  • linux-image-2.6.10-5-amd64-generic -
  • linux-image-2.6.10-5-686-smp -
  • linux-image-2.6.8.1-5-386 -
  • linux-image-2.6.10-5-686 -
  • linux-image-2.6.8.1-5-amd64-k8 -

In general, a standard system update will make all the necessary changes.