CVE-2016-4356

Published: Jun 13, 2016Modified: May 6, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

The append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.3 allows remote attackers to cause a denial of service (out-of-bounds read) by clearing the high bit of the byte after invalid utf-8 encoded data.

Affected (3)

Products: Gnupg: Libksba · Canonical: Ubuntu Linux

1 product

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Gnupg Libksba	Up to 1.3.2

Configuration B

2 vulnerable

Vulnerable Software	Affected Versions
Canonical Ubuntu Linux	Version 12.04
Canonical Ubuntu Linux	Version 14.04

Related CWEs

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

References (12)

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git%3Ba=commit%3Bh=243d12fdec66a4360fbb3e307a046b39b5b4ffc3

Source: secalert@redhat.com

http://www.openwall.com/lists/oss-security/2016/04/29/5

Source: secalert@redhat.com

http://www.openwall.com/lists/oss-security/2016/04/29/8

Source: secalert@redhat.com

http://www.openwall.com/lists/oss-security/2016/05/10/3

Source: secalert@redhat.com

http://www.ubuntu.com/usn/USN-2982-1

Source: secalert@redhat.com

https://security.gentoo.org/glsa/201604-04

Source: secalert@redhat.com

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git%3Ba=commit%3Bh=243d12fdec66a4360fbb3e307a046b39b5b4ffc3