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CVE-2021-3672

Publication date 10 August 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.6 · Medium

Score breakdown

A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.

Status

Package Ubuntu Release Status
c-ares 22.04 LTS jammy
Fixed 1.17.1-1ubuntu1
21.10 impish
Fixed 1.17.1-1ubuntu1
21.04 hirsute
Fixed 1.17.1-1ubuntu0.1
20.04 LTS focal
Fixed 1.15.0-1ubuntu0.1
18.04 LTS bionic
Fixed 1.14.0-1ubuntu0.1
16.04 LTS xenial
14.04 LTS trusty Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
c-ares

Severity score breakdown

Parameter Value
Base score 5.6 · Medium
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact Low
Availability impact Low
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

References

Related Ubuntu Security Notices (USN)

Other references