A security flaw was found in the way UTF-8 decoder of boost, set of free peer-reviewed portable C++ source libraries, performed validation of certain UTF-8 encoded sequences. If an application, linked against boost used the UTF-8 decoding routines for input validation (and depended at the results), an attacker could use this flaw to confuse the validator into (errorneously) accepting them as valid.

Upstream bug report: [1] https://svn.boost.org/trac/boost/ticket/7743

Upstream advisory: [2] http://www.boost.org/users/news/boostlocalesecuritynotice.html

Relevant upstream patch: [3] http://cppcms.com/files/locale/boostlocaleutf.patch

References: [4] http://www.openwall.com/lists/oss-security/2013/02/04/1 [5] http://www.openwall.com/lists/oss-security/2013/02/04/2

The getrepeattype function in basicregexcreator.hpp in the Boost regex library (aka Boost.Regex) in Boost 1.33 and 1.34 allows context-dependent attackers to cause a denial of service (NULL dereference and crash) via an invalid regular expression.

regex/v4/perlmatchernonrecursive.hpp in the Boost regex library (aka Boost.Regex) in Boost 1.33 and 1.34 allows context-dependent attackers to cause a denial of service (failed assertion and crash) via an invalid regular expression.