CVE-2016-7444

MEDIUM

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.

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/964632f37dfdfb914ebc5e49db4fa29af35b1de9

https://lists.gnupg.org/pipermail/gnutls-devel/2016-September/008146.html

https://www.gnutls.org/security.html

Details

Source: MITRE

Published: 2016-09-27

Updated: 2018-01-05

Type: CWE-264

Risk Information

CVSS v2.0

Base Score: 5

Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N)

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH