CVE-2011-2702 Information

Description

Integer signedness error in Glibc before 2.13 and eglibc before 2.13 when using Supplemental Streaming SIMD Extensions 3 (SSSE3) optimization allows context-dependent attackers to execute arbitrary code via a negative length parameter to (1) memcpy-ssse3-rep.S (2) memcpy-ssse3.S or (3) memset-sse2.S in sysdeps/i386/i686/multiarch/ which triggers an out-of-bounds read as demonstrated using the memcpy function.

Reference

http://seclists.org/oss-sec/2011/q3/123 http://seclists.org/oss-sec/2011/q3/153 http://www.eglibc.org/cgi-bin/viewvc.cgi/trunk/libc/ChangeLog?view=markup&pathrev=10032 http://www.nodefense.org/eglibc.txt http://www.osvdb.org/80718 http://xorl.wordpress.com/2011/08/06/cve-2011-2702-eglibc-and-glibc-signedness-issue/ https://bugzilla.novell.com/show_bug.cgi?id=706915 https://sourceware.org/git/?p=glibc.git;a=commit;h=a0ac24d98ace90d1ccba6a2f3e7d55600f2fdb6e