A glibc security update has been released for Arch Linux to address a heap-based buffer over-read.

Arch Linux Security Advisory ASA-201911-3
========================================

Severity: High
Date : 2019-11-03
CVE-ID : CVE-2019-9169
Package : glibc
Type : information disclosure
Remote : No
Link : https://security.archlinux.org/AVG-855

Summary
======

The package glibc before version 2.30-1 is vulnerable to information disclosure.

Resolution
=========

Upgrade to 2.30-1.

# pacman -Syu "glibc>=2.30-1"

The problem has been fixed upstream in version 2.30.

Workaround
=========

None.

Description
==========

In the GNU C Library (aka glibc or libc6) through 2.29,
proceed_next_node in posix/regexec.c has a heap-based buffer over-read via an attempted case-insensitive regular-expression match.
Impact
=====
An attacker is able to use malicious regular expressions to get access to sensitive information.

References
=========

https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;hX3dd860d5b833037175247230a328f0050dbfe9
https://sourceware.org/bugzilla/show_bug.cgi?id$114
https://debbugs.gnu.org/cgi/bugreport.cgi?bug4142
https://debbugs.gnu.org/cgi/bugreport.cgi?bug4140
https://security.archlinux.org/CVE-2019-9169