Vulnerability Description
The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.8, when used without the ASN1_DECODE_FLAG_STRICT_DER flag, allows remote attackers to cause a denial of service (infinite recursion) via a crafted certificate.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Ubuntu Linux | 12.04 |
| Opensuse | Opensuse | 13.2 |
| Gnu | Libtasn1 | <= 4.7 |
| Fedoraproject | Fedora | 22 |
Related Weaknesses (CWE)
References
- http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=a6e0a0b58f5cda
- http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=f435825c0f527a
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182299.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182907.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183221.html
- http://lists.opensuse.org/opensuse-updates/2016-06/msg00047.html
- http://lists.opensuse.org/opensuse-updates/2016-06/msg00097.html
- http://www.debian.org/security/2016/dsa-3568
- http://www.openwall.com/lists/oss-security/2016/04/11/3
- http://www.ubuntu.com/usn/USN-2957-1
- http://www.ubuntu.com/usn/USN-2957-2
- https://lists.gnu.org/archive/html/help-libtasn1/2016-04/msg00009.html
- https://security.gentoo.org/glsa/201703-05
- http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=a6e0a0b58f5cda
- http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=f435825c0f527a
FAQ
What is CVE-2016-4008?
CVE-2016-4008 is a vulnerability with a CVSS score of 5.9 (MEDIUM). The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.8, when used without the ASN1_DECODE_FLAG_STRICT_DER flag, allows remote attackers to cause a denial of service (infinit...
How severe is CVE-2016-4008?
CVE-2016-4008 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-4008?
Check the references section above for vendor advisories and patch information. Affected products include: Canonical Ubuntu Linux, Opensuse Opensuse, Gnu Libtasn1, Fedoraproject Fedora.