CVE-2016-7444
HIGH severity · CVSS 7.5 · CWE-264
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactHigh
Availability impactNone
Exploit probability (EPSS)2%
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9 ↗
Additional information
- NVD record
- https://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9Patch
- https://www.gnutls.org/security.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2017-02/msg00005.html
- http://www.securityfocus.com/bid/92893
- https://access.redhat.com/errata/RHSA-2017:2292
- https://lists.gnupg.org/pipermail/gnutls-devel/2016-September/008146.htmlAdvisory