Multiple directory traversal vulnerabilities in GNU C Library (aka glibc or libc6) before 2.20 allow context-dependent attackers to bypass ForceCommand restrictions and possibly have other unspecified impact via a .. (dot dot) in a (1) LC_*, (2) LANG, or other locale environment variable.
https://sourceware.org/bugzilla/show_bug.cgi?id=17137
https://security.gentoo.org/glsa/201602-02
https://rhn.redhat.com/errata/RHSA-2014-1110.html
http://www.securitytracker.com/id/1030569
http://www.securityfocus.com/bid/68505
http://www.openwall.com/lists/oss-security/2014/07/14/6
http://www.openwall.com/lists/oss-security/2014/07/10/7
http://www.mandriva.com/security/advisories?name=MDVSA-2014:152