Arch Linux ASA-201706-10 High: lib32-libtasn1 Arbitrary Code Execution

Arch Linux Security Advisory ASA-201706-10
=========================================
Severity: High
Date    : 2017-06-12
CVE-ID  : CVE-2017-6891
Package : lib32-libtasn1
Type    : arbitrary code execution
Remote  : No
Link    : https://security.archlinux.org/AVG-286

Summary
======
The package lib32-libtasn1 before version 4.11-1 is vulnerable to
arbitrary code execution.

Resolution
=========
Upgrade to 4.11-1.

# pacman -Syu "lib32-libtasn1>=4.11-1"

The problem has been fixed upstream in version 4.11.

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

Description
==========
Two errors in the "asn1_find_node()" function (lib/parser_aux.c) within
GnuTLS libtasn1 version 4.10 can be exploited to cause a stacked-based
buffer overflow by tricking a user into processing a specially crafted
assignments file via the e.g. asn1Coding utility.

Impact
=====
An attacker can execute arbitrary code on the affected host by tricking
a local user into processing a specially crafted assignments file.

References
=========

https://www.flexera.com/products/security/software-vulnerability-research/secunia-research?referrer=secunia/
https://security.archlinux.org/CVE-2017-6891