CVE-2016-4574 Information

Description

Off-by-one error in the append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.4 allows remote attackers to cause a denial of service (out-of-bounds read) via invalid utf-8 encoded data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-4356.

CVSS Vector

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

Reference

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=commit;h=6be61daac047d8e6aa941eb103f8e71a1d4e3c75 http://lists.opensuse.org/opensuse-updates/2016-05/msg00087.html http://lists.opensuse.org/opensuse-updates/2016-06/msg00028.html http://www.openwall.com/lists/oss-security/2016/05/10/3 http://www.openwall.com/lists/oss-security/2016/05/10/4 http://www.ubuntu.com/usn/USN-2982-1

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5