Multiple integer overflows in io/prprf.c in Mozilla Netscape Portable Runtime (NSPR) before 4.12 allow remote attackers to cause a denial of service (buffer overflow) or possibly have unspecified other impact via a long string to a PR_*printf function.
https://hg.mozilla.org/projects/nspr/rev/96381e3aaae2
https://groups.google.com/forum/message/raw?msg=mozilla.dev.tech.nspr/dV4MyMsg6jw/hhWcXOgJDQAJ
https://bugzilla.mozilla.org/show_bug.cgi?id=1174015
http://www.ubuntu.com/usn/USN-3023-1