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CVE-2022-0336

Publication date 31 January 2022

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

8.8 · High

Score breakdown

The Samba AD DC includes checks when adding service principals names (SPNs) to an account to ensure that SPNs do not alias with those already in the database. Some of these checks are able to be bypassed if an account modification re-adds an SPN that was previously present on that account, such as one added when a computer is joined to a domain. An attacker who has the ability to write to an account can exploit this to perform a denial-of-service attack by adding an SPN that matches an existing service. Additionally, an attacker who can intercept traffic can impersonate existing services, resulting in a loss of confidentiality and integrity.

Status

Package Ubuntu Release Status
samba 22.04 LTS jammy
Fixed 4.13.17~dfsg-0ubuntu1
21.10 impish
Fixed 2:4.13.17~dfsg-0ubuntu0.21.10.1
20.04 LTS focal
Fixed 2:4.13.17~dfsg-0ubuntu0.21.04.1
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Severity score breakdown

Parameter Value
Base score 8.8 · High
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-5260-1
    • Samba vulnerabilities
    • 1 February 2022

Other references