Format string flaw was found in the way boinc-client, a Berkeley Open Infrastructure for Network Computing (BOINC) client for distributed computing, performed account information write / dump into corresponding XML file. An attacker could provide an account file (file containing account information) with specially-crafted value of the 'guiurls' item that, when processed would lead to boinc-client executable crash or, potentially, arbitrary code execution with the privileges of the user running the boinc-client binary.

References: [1] http://www.openwall.com/lists/oss-security/2013/04/28/3

Relevant upstream patch: [2] http://boinc.berkeley.edu/gitweb/?p=boinc-v2.git;a=commitdiff;h=99258dcecba8ef36e1ce0fd6e0dacffe53613ac9