USN-1546-1: libgc vulnerability

Ubuntu Security Notice USN-1546-1

28th August, 2012

libgc vulnerability

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

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS


Applications using libgc could be made to crash or run arbitrary programs as your login.

Software description

  • libgc - Boehm-Demers-Weiser garbage collecting storage allocator library


It was discovered that multiple integer overflows existed in the
malloc and calloc implementations in the Boehm-Demers-Weiser garbage
collecting memory allocator (libgc). These could allow an attacker
to cause a denial of service or possibly execute arbitrary code.

Update instructions

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

Ubuntu 12.04 LTS:
libgc1c2 1:7.1-8ubuntu0.12.04.1
Ubuntu 11.10:
libgc1c2 1:7.1-8ubuntu0.11.10.1
Ubuntu 11.04:
libgc1c2 1:6.8-1.2ubuntu3.2
Ubuntu 10.04 LTS:
libgc1c2 1:6.8-1.2ubuntu1.1
Ubuntu 8.04 LTS:
libgc1c2 1:6.8-1.1ubuntu0.1

To update your system, please follow these instructions:

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