CVE-2022-4254 — sssd: libsss_certmap fails to sanitise certificate data used in LDAP filters

sssd: libsss_certmap fails to sanitise certificate data used in LDAP filters

01What is this vulnerability?

sssd: libsss_certmap fails to sanitise certificate data used in LDAP filters

02Affected products

Vendor	Product	Versions
n	a / SSSD	Affects SSSD 1.15.3, Fixed in SSSD 2.3.1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-02-01T00:00:00.000Z
• Last modified: 2025-03-27T14:42:34.058Z

09References

• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=2149894
• github.com — https://github.com/SSSD/sssd/issues/5135
• github.com — https://github.com/SSSD/sssd/commit/a2b9a84460429181f2a4fa7e2bb5ab49fd561274
• access.redhat.com — https://access.redhat.com/security/cve/CVE-2022-4254
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/05/msg00028.html