Vulnerability in GNU Libtasn1
CVE-2016-4008
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.259 (97.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.259 · newest: 0.259 · change: 0.000
Affected products
- GNU Libtasn1
- Canonical Ubuntu Linux — versions 12.04, 14.04, 15.10
- Fedoraproject Fedora — versions 22, 23, 24
- openSUSE — versions 13.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.gentoo.org/glsa/201703-05 (vendor-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2016-April/182299.html (vendor-advisory)
- git.savannah.gnu.org/gitweb/
- www.ubuntu.com/usn/USN-2957-2 (vendor-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2016-April/182907.html (vendor-advisory)
- lists.opensuse.org/opensuse-updates/2016-06/msg00047.html (vendor-advisory)
- lists.gnu.org/archive/html/help-libtasn1/2016-04/msg00009.html (mailing-list)
- git.savannah.gnu.org/gitweb/
- www.debian.org/security/2016/dsa-3568 (vendor-advisory)
- lists.opensuse.org/opensuse-updates/2016-06/msg00097.html (vendor-advisory)
Frequently asked questions
- What is CVE-2016-4008?
- CVE-2016-4008 is a medium-severity vulnerability in GNU Libtasn1, classified under CWE-399. CVSS score: 5.9/10. Published 2016-05-05.
- How severe is CVE-2016-4008?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2016-4008 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.