The boost packages provide free, peer-reviewed, portable C++ source libraries with emphasis on libraries which work well with the C++ Standard Library.
A flaw was found in the way the ordered_malloc() routine in Boost sanitized the 'next_size' and 'max_size' parameters when allocating memory. If an application used the Boost C++ libraries for memory allocation, and performed memory allocation based on user-supplied input, an attacker could use this flaw to crash the application or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2012-2677)
All users of boost are advised to upgrade to these updated packages, which contain a backported patch to fix this issue.