Subject: [ASA-201705-21] lib32-nss: arbitrary code execution

Arch Linux Security Advisory ASA-201705-21
==========================================

Severity: Critical
Date    : 2017-05-29
CVE-ID  : CVE-2017-5461
Package : lib32-nss
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-248

Summary
=======

The package lib32-nss before version 3.30.2-1 is vulnerable to
arbitrary code execution.

Resolution
==========

Upgrade to 3.30.2-1.

# pacman -Syu "lib32-nss>=3.30.2-1"

The problem has been fixed upstream in version 3.30.2.

Workaround
==========

None.

Description
===========

An out-of-bounds write during Base64 decoding operation has been found
in the Network Security Services (NSS) library due to insufficient
memory being allocated to the buffer.
An attacker could use this flaw to create a specially crafted
certificate which, when parsed by NSS, could cause it to crash or
execute arbitrary code, using the permissions of the user running an
application compiled against the NSS library. The issue has been fixed
in releases 3.29.5 and 3.30.1.

Impact
======

A remote attacker can execute arbitrary code on the affected host,
using a specially crafted certificate.

References
==========

https://www.mozilla.org/en-US/security/advisories/mfsa2017-10/#CVE-2017-5461
https://bugzilla.mozilla.org/show_bug.cgi?id=1344380
https://hg.mozilla.org/projects/nss/rev/ac34db053672
https://security.archlinux.org/CVE-2017-5461