Arch Linux Security Update: ASA-201512-16 Critical nghttp2 Use-After-Free

The package nghttp2 before version 1.6.0-1 is vulnerable to a heap-based use-after-free, leading to denial of service or possibly arbitrary code execution.

Arch Linux Security Advisory ASA-201512-16
=========================================
Severity: High
Date    : 2015-12-25
CVE-ID  : CVE-2015-8659
Package : nghttp2
Type    : use-after-free
Remote  : Yes
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package nghttp2 before version 1.6.0-1 is vulnerable to a heap-based
use-after-free, leading to denial of service or possibly arbitrary code
execution.

Resolution
=========
Upgrade to 1.6.0-1.

# pacman -Syu "nghttp2>=1.6.0-1"

The problem has been fixed upstream in version 1.6.0.

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

Description
==========
nghttp2 1.6.0 fixes a heap-based use-after-free bug in idle stream
handling code, where an idle/closed stream could possibly be destroyed
while it was still referenced.

Impact
=====
A remote attacker could exploit this bug in a HTTP/2 client or server,
leading to denial of service or even arbitrary code execution.

References
=========
https://access.redhat.com/security/cve/CVE-2015-8659
https://seclists.org/oss-sec/2015/q4/576
https://nghttp2.org/blog/2015/12/23/nghttp2-v1-6-0/
https://github.com/nghttp2/nghttp2/commit/92a56d034f201cbb609606184822cf1716677207