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CVE-2021-25219

Publication date 27 October 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.

Status

Package Ubuntu Release Status
bind9 22.04 LTS jammy
Fixed 1:9.16.15-1ubuntu2
21.10 impish
Fixed 1:9.16.15-1ubuntu1.1
21.04 hirsute
Fixed 1:9.16.8-1ubuntu3.2
20.04 LTS focal
Fixed 1:9.16.1-0ubuntu2.9
18.04 LTS bionic
Fixed 1:9.11.3+dfsg-1ubuntu1.16
16.04 LTS xenial
14.04 LTS trusty

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Severity score breakdown

Parameter Value
Base score 5.3 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

Other references