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AUSCERT External Security Bulletin Redistribution
ESB-2021.0611
USN-4737-1: Bind vulnerability
19 February 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: bind
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-8625
Reference: ESB-2021.0610
Original Bulletin:
https://ubuntu.com/security/notices/USN-4737-1
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USN-4737-1: Bind vulnerability
18 February 2021
Bind could be made to crash or run programs if it received specially
crafted network traffic.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o bind9 - Internet Domain Name Server
Details
It was discovered that Bind incorrectly handled GSSAPI security policy
negotiation. A remote attacker could use this issue to cause Bind to crash,
resulting in a denial of service, or possibly execute arbitrary code. In
the default installation, attackers would be isolated by the Bind AppArmor
profile.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o bind9 - 1:9.16.6-3ubuntu1.1
Ubuntu 20.04
o bind9 - 1:9.16.1-0ubuntu2.6
Ubuntu 18.04
o bind9 - 1:9.11.3+dfsg-1ubuntu1.14
Ubuntu 16.04
o bind9 - 1:9.10.3.dfsg.P4-8ubuntu1.18
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-8625
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