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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 2.44% probability · 84th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- gnu/gnutls
- Source
- security@debian.org
EPSS 2.4% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9Patch
- https://lists.gnupg.org/pipermail/gnutls-devel/2016-September/008146.htmlMailing List, Third Party Advisory
- https://www.gnutls.org/security.htmlVendor Advisory
- 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://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9Patch
- https://lists.gnupg.org/pipermail/gnutls-devel/2016-September/008146.htmlMailing List, Third Party Advisory
- https://www.gnutls.org/security.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.