CVE-2022-0336

Description

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.

How to fix CVE-2022-0336

To remediate CVE-2022-0336, upgrade the affected package to a fixed version below.

• —upgrade to 4.15.12-r0 or later
• —upgrade to 2:4.13.13+dfsg-1~deb11u3 or later

Is CVE-2022-0336 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 4.15.12-r0
• from 0, < 2:4.13.13+dfsg-1~deb11u3

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2022-0336
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-0336