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CVE-2022-4254

Public on 2023-01-24
Modified on 2024-02-06
Description

A vulnerability was found in SSSD, in the libsss_certmap functionality. PKINIT enables a client to authenticate to the KDC using an X.509 certificate and the corresponding private key, rather than a passphrase or keytab. FreeIPA uses mapping rules to map a certificate presented during a PKINIT authentication request to the corresponding principal. The mapping filter is vulnerable to LDAP filter injection. The search result can be influenced by values in the certificate, which may be attacker controlled. In the most extreme case, an attacker could gain control of the admin account, leading to full domain takeover.

Severity
Important
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CVSS v3 Base Score
8.8
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 sssd 2023-03-30 22:50 ALAS-2023-1723
Amazon Linux 2 - Core sssd 2023-03-17 16:34 ALAS2-2023-1995

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv3 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H