Arch Linux alert ASA-201910-6 (unbound)

From:
             
 
Santiago Torres-Arias <santiago@archlinux.org> 
To:
             
 
Archlinux security <arch-security@archlinux.org> 
Subject:
             
 
[ASA-201910-6] unbound: denial of service 
Date:
             
 
Fri, 11 Oct 2019 17:08:13 -0400
Message-ID:
             
 
<20191011210812.du2jl6hl56p7nr6n@LykOS.localdomain>
Arch Linux Security Advisory ASA-201910-6
=========================================

Severity: High
Date    : 2019-10-11
CVE-ID  : CVE-2019-16866
Package : unbound
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1042

Summary
=======

The package unbound before version 1.9.4-1 is vulnerable to denial of
service.

Resolution
==========

Upgrade to 1.9.4-1.

# pacman -Syu "unbound>=1.9.4-1"

The problem has been fixed upstream in version 1.9.4.

Workaround
==========

None.

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

Due to an error in parsing NOTIFY queries, it is possible for Unbound
from 1.7.1 up to and including 1.9.3 to continue processing malformed
queries and may ultimately result in a pointer dereference in
uninitialized memory. This results in a crash of the Unbound daemon.

Impact
======

A remote attacker might be able to crash the Unbound server via crafted
NOTIFY queries.

References
==========

https://www.nlnetlabs.nl/downloads/unbound/CVE-2019-16866...
https://github.com/NLnetLabs/unbound/commit/b60c4a472c856...
https://security.archlinux.org/CVE-2019-16866