Vulnerability in GNU Gnutls
CVE-2016-7444
The gnutls_ocsp_resp_check_crt function in lib/x509/ocsp.c in GnuTLS before 3.4.15 and 3.5.x before 3.5.4 does not verify the serial length of an OCSP response, which might allow remote attackers to bypass an intended certificate validation mechanism via vectors involving trailing bytes left by gnutls_malloc.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.024 (83.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000
Affected products
- GNU Gnutls — versions 3.5.0, 3.5.1, 3.5.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/92893 (vdb-entry)
- gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9 (Patch)
- access.redhat.com/errata/RHSA-2017:2292 (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2017-02/msg00005.html (vendor-advisory)
- lists.gnupg.org/pipermail/gnutls-devel/2016-September/008146.html (mailing-list, Mailing List, Third Party Advisory)
- www.gnutls.org/security.html (Vendor Advisory)
Frequently asked questions
- What is CVE-2016-7444?
- CVE-2016-7444 is a high-severity vulnerability in GNU Gnutls, classified under CWE-264. CVSS score: 7.5/10. Published 2016-09-27.
- How severe is CVE-2016-7444?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-7444 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.