CVE-2022-2031

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-08-25 · updated 2026-06-17
Weakness: CWE-288

Description

A flaw was found in Samba. The security vulnerability occurs when KDC and the kpasswd service share a single account and set of keys, allowing them to decrypt each other's tickets. A user who has been requested to change their password, can exploit this flaw to obtain and use tickets to other services.

Affected products

Samba: before 4.14.14; from 4.15.0 before 4.15.9; from 4.16.0 before 4.16.4 — fixed in 4.14.14, 4.15.9, 4.16.4

How to fix

Upgrade to a fixed version: Samba 4.14.14, 4.15.9, 4.16.4. Check the vendor advisory for mitigations.

References

https://security.gentoo.org/glsa/202309-06
https://www.samba.org/samba/security/CVE-2022-2031.html
https://security.gentoo.org/glsa/202309-06
https://www.samba.org/samba/security/CVE-2022-2031.html

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