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CVE-2016-7444

Published: 27 September 2016

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.

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
gnutls26
Launchpad, Ubuntu, Debian
yakkety Does not exist

zesty Does not exist

artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Not vulnerable

trusty Not vulnerable

upstream Not vulnerable

xenial Does not exist

gnutls28
Launchpad, Ubuntu, Debian
artful Not vulnerable
(3.5.3-4ubuntu1)
bionic Not vulnerable
(3.5.3-4ubuntu1)
cosmic Not vulnerable
(3.5.3-4ubuntu1)
disco Not vulnerable
(3.5.3-4ubuntu1)
trusty Does not exist
(trusty was needed)
upstream
Released (3.5.3-4)
xenial
Released (3.4.10-4ubuntu1.2)
yakkety Not vulnerable
(3.5.3-4ubuntu1)
zesty Not vulnerable
(3.5.3-4ubuntu1)
precise Not vulnerable
(code not present)
Patches:
upstream: https://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9
upstream: https://gitlab.com/gnutls/gnutls/commit/c089e019ef83a77b2fdca24d0875ef25f6b38f1a (3.3)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N