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

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
gnutls26 Launchpad, Ubuntu, Debian	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
	yakkety	Does not exist
	zesty	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)
	precise	Not vulnerable (code not present)
	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)
	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

References

Bugs

https://bugzilla.redhat.com/show_bug.cgi?id=1374266

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