QID 354824

Date Published: 2023-03-23

QID 354824: Amazon Linux Security Advisory for sssd : ALAS2-2023-1995

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. (
( CVE-2022-4254)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as Critical - 8.8 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2-2023-1995 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 354824

    CVE-2022-4254 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2-2023-1995 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALAS-2023-1995.html
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