CVE-2012-3405 Information

Description

The vfprintf function in stdio-common/vfprintf.c in libc in GNU C Library (aka glibc) 2.14 and other versions does not properly calculate a buffer length which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (segmentation fault and crash) via a format string with a large number of format specifiers that triggers \desynchronization within the buffer size handling\ a different vulnerability than CVE-2012-3404.

Reference

http://rhn.redhat.com/errata/RHSA-2012-1098.html http://rhn.redhat.com/errata/RHSA-2012-1200.html http://www.openwall.com/lists/oss-security/2012/07/11/17 http://www.ubuntu.com/usn/USN-1589-1 https://bugzilla.redhat.com/show_bug.cgi?id=833704 https://security.gentoo.org/glsa/201503-04 https://sourceware.org/bugzilla/show_bug.cgi?id=13446