Arch Linux ASA-201605-17 Medium: Libksba Denial Of Service Issue

Arch Linux Security Advisory ASA-201605-17
=========================================
Severity: Medium
Date    : 2016-05-12
CVE-ID  : CVE-2016-4574
Package : libksba
Type    : denial of service
Remote  : Yes
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package libksba before version 1.3.4-1 is vulnerable to denial of
service or other unspecified impact.

Resolution
=========
Upgrade to 1.3.4-1.

# pacman -Syu "libksba>=1.3.4-1"

The problem has been fixed upstream in version 1.3.4.

Workaround
=========
None.

Description
==========
An out-of-bound read access due to incorrect utf-8 strings handling has
been in found in the _ksba_dn_to_str() function.
This issue is due to an incomplete fix for CVE-2016-4356, caused by an
off-by-one error when handling incorrect utf-8 strings.

Impact
=====
A remote attacker might be able to crash the application using libksba,
causing a denial of service, or have other unspecified impact.

References
=========
https://bugs.archlinux.org/task/49289
https://www.openwall.com/lists/oss-security/2016/05/10/4
https://access.redhat.com/security/cve/CVE-2016-4574