Access Restriction Bypass The advisory has been revoked - it doesn't affect any version of package gnutls28 (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1704-GNUTLS28-619823
- published27 Sept 2016
- disclosed27 Sept 2016
Introduced: 27 Sep 2016
CVE-2016-7444 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:17.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream gnutls28 package and not the gnutls28 package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-7444
- https://security-tracker.debian.org/tracker/CVE-2016-7444
- https://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9
- https://lists.gnupg.org/pipermail/gnutls-devel/2016-September/008146.html
- https://www.gnutls.org/security.html
- http://lists.opensuse.org/opensuse-security-announce/2017-02/msg00005.html
- https://access.redhat.com/errata/RHSA-2017:2292
- http://www.securityfocus.com/bid/92893