Arch Linux alert ASA-202009-15 (lib32-zeromq)

From:
             
 
Morten Linderud <foxboron@archlinux.org>
To:
             
 
arch-security@archlinux.org
Subject:
             
 
[ASA-202009-15] lib32-zeromq: denial of service
Date:
             
 
Tue, 06 Oct 2020 22:10:57 +0200
Message-ID:
             
 
<20201006201057.bdrdolzubhoanpuw@anathema>
Arch Linux Security Advisory ASA-202009-15
==========================================

Severity: High
Date    : 2020-09-26
CVE-ID  : CVE-2020-15166
Package : lib32-zeromq
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1220

Summary
=======

The package lib32-zeromq before version 4.3.3-1 is vulnerable to denial
of service.

Resolution
==========

Upgrade to 4.3.3-1.

# pacman -Syu "lib32-zeromq>=4.3.3-1"

The problem has been fixed upstream in version 4.3.3.

Workaround
==========

None.

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

A denial of service has been found in libzmq before 4.3.3, allowing
unauthenticated clients to prevent legitimate clients from exchange any
message with a CURVE/ZAP-protected server.

Impact
======

A remote attacker might be able to cause a denial of service through a
malicious connection.

References
==========

https://github.com/zeromq/libzmq/security/advisories/GHSA...
https://github.com/zeromq/libzmq/pull/3913/commits/e7f009...
https://oss-fuzz.com/testcase-detail/5707174518194176
https://security.archlinux.org/CVE-2020-15166