USN-4468-1: Bind vulnerabilities
21 August 2020
Several security issues were fixed in Bind.
Releases
Packages
- bind9 - Internet Domain Name Server
Details
Emanuel Almeida discovered that Bind incorrectly handled certain TCP
payloads. A remote attacker could possibly use this issue to cause Bind to
crash, resulting in a denial of service. This issue only affected Ubuntu
20.04 LTS. (CVE-2020-8620)
Joseph Gullo discovered that Bind incorrectly handled QNAME minimization
when used in certain configurations. A remote attacker could possibly use
this issue to cause Bind to crash, resulting in a denial of service. This
issue only affected Ubuntu 20.04 LTS. (CVE-2020-8621)
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)
Lyu Chiy discovered that Bind incorrectly handled certain queries. A remote
attacker could possibly use this issue to cause Bind to crash, resulting in
a denial of service. (CVE-2020-8623)
Joop Boonen discovered that Bind incorrectly handled certain subdomain
update-policy rules. A remote attacker granted privileges to change certain
parts of a zone could use this issue to change other contents of the zone,
contrary to expectations. This issue only affected Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-8624)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
In general, a standard system update will make all the necessary changes.