Arch Linux alert ASA-201911-3 (glibc)

From:
             
 
Christian Rebischke <Chris.Rebischke@archlinux.org> 
To:
             
 
arch-security@archlinux.org 
Subject:
             
 
[ASA-201911-3] glibc: information disclosure 
Date:
             
 
Mon, 4 Nov 2019 20:22:39 +0100
Message-ID:
             
 
<20191104192239.GA52686@motoko.nullday.de>
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=commi...
https://sourceware.org/bugzilla/show_bug.cgi?id=24114
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34142
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34140
https://security.archlinux.org/CVE-2019-9169