It was reported [1],[2] that there are potential security problems with allocating memory in glibc's getaddrinfo() function. As noted in the posting to the oss-security mailing list: "I believe the analysis in this bug report is incorrect. The security implications are unclear. A straight copy of a long name to a stack buffer should trigger a crash because it hits the guard page, but even that could be a problem for daemons. On the other hand, it's impossible to know for sure that no GCC version ever lays out the stack in such a way that we end up with a problem. Multi-threaded programs linking in script interpreters are more exposed to these problems, too." [1] http://sourceware.org/bugzilla/show_bug.cgi?id=12671 [2] http://www.openwall.com/lists/oss-security/2013/08/22/4
This issue has been addressed in the previous versions of Red Hat Enterprise Linux 5 and 6 by the following advisories: Red Hat Enterprise Linux 5: http://rhn.redhat.com/errata/RHBA-2013-0022.html https://bugzilla.redhat.com/show_bug.cgi?id=797096 Red Hat Enterprise Linux 6: http://rhn.redhat.com/errata/RHBA-2012-0763.html https://bugzilla.redhat.com/show_bug.cgi?id=797094
Statement: This issue has already been addressed in Red Hat Enterprise Linux 5 via http://rhn.redhat.com/errata/RHBA-2013-0022.html and in Red Hat Enterprise Linux 6 via http://rhn.redhat.com/errata/RHBA-2012-0763.html
This issue does not affect the version of glibc as shipped with Fedora 18 and 19.
This issue was incorrectly assigned a duplicate CVE ID, CVE-2012-6686, and should be referred to by the original ID: CVE-2013-4357.
Hi I suggest to remove the CVE-2012-6686 in the subject and as alias for this bug. The CVE-2012-6686 has in meanwhile been properly rejected. Regards, Salvatore
See: https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=CVE-2012-6686