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AUSCERT External Security Bulletin Redistribution
ESB-2019.3773
USN-4149-1: Unbound vulnerability
9 October 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: unbound
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-16866
Original Bulletin:
https://usn.ubuntu.com/4149-1/
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running unbound check for an updated version of the software for
their operating system.
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USN-4149-1: Unbound vulnerability
8 October 2019
unbound vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
Summary
Unbound could be made to crash if it received a specially crafted NOTIFY query.
Software Description
o unbound - validating, recursive, caching DNS resolver
Details
It was discovered that Unbound incorrectly handled certain NOTIFY queries. An
attacker could possibly use this issue to cause a denial of service.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.04
libunbound8 - 1.9.0-2ubuntu0.1
unbound - 1.9.0-2ubuntu0.1
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-16866
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