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AUSCERT External Security Bulletin Redistribution
ESB-2020.2888
USN-4468-2: Bind vulnerability
25 August 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Bind
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-8622
Reference: ESB-2020.2881
ESB-2020.2872
Original Bulletin:
https://usn.ubuntu.com/4468-2/
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USN-4468-2: Bind vulnerability
24 August 2020
Bind could be made to crash if it received a specially crafted
request.
Releases
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Packages
o bind9 - Internet Domain Name Server
Details
USN-4468-1 fixed a vulnerability in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
Dave Feldman, Jeff Warren, and Joel Cunningham discovered that Bind
incorrectly handled certain truncated responses to a TSIG-signed request. A
remote attacker could possibly use this issue to cause Bind to crash,
resulting in a denial of service. (CVE-2020-8622)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04
o bind9 - 1:9.9.5.dfsg-3ubuntu0.19+esm3
Ubuntu 12.04
o bind9 - 1:9.8.1.dfsg.P1-4ubuntu0.31
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-8622
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