The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.5 allows remote attackers to cause a denial of service (out-of-bounds heap read) via a crafted certificate.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-3622
• https://access.redhat.com/errata/RHSA-2017:1860
• https://lists.gnu.org/archive/html/help-libtasn1/2015-04/msg00000.html
• https://security.gentoo.org/glsa/201509-04
• http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158225.html
• http://lists.opensuse.org/opensuse-updates/2015-08/msg00014.html
• http://lists.opensuse.org/opensuse-updates/2016-06/msg00047.html
• http://lists.opensuse.org/opensuse-updates/2016-06/msg00097.html
• http://packetstormsecurity.com/files/131711/libtasn1-Heap-Overflow.html
• http://seclists.org/fulldisclosure/2015/Apr/109
• http://www.debian.org/security/2015/dsa-3256
• http://www.mandriva.com/security/advisories?name=MDVSA-2015:232
• http://www.securityfocus.com/bid/74419
• http://www.securitytracker.com/id/1032246
• http://www.ubuntu.com/usn/USN-2604-1