CVE-2016-4008

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 29.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-05-05 · updated 2026-06-17
Weakness: CWE-399

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.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 15.10, 16.04
Fedoraproject Fedora: 22, 23, 24
GnuTLS libtasn1: through 4.7
Opensuse: 13.2

References

http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=a6e0a0b58f5cdaf4e9beca5bce69c09808cbb625
http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=f435825c0f527a8e52e6ffbc3ad0bc60531d537e
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

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