CVE Catalog

CVE-2024-2698

HighCVSS 8.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
0.67%

52th percentile - higher than 52% of all known CVEs

Summary

A vulnerability was found in FreeIPA related to the initial MS-SFU implementation in MIT Kerberos, which lacked a condition for granting the "forwardable" flag on S4U2Self tickets. In FreeIPA 4.11.0, a modification to ipadb_match_acl() caused the mechanism to apply both when the target service argument is set and unset, resulting in S4U2Proxy requests being accepted regardless of a matching delegation rule.

Risk Assessment

An attacker could exploit improper delegation to gain unauthorized access to services in the domain, potentially leading to privilege escalation within the FreeIPA environment.

Recommendation

Update FreeIPA to a patched version. Review service delegation rules and restrict the ability to create S4U2Proxy requests.

Other vulnerabilities in FreeIPA

See all
Original NVD description (English source)

A vulnerability was found in FreeIPA in how the initial implementation of MS-SFU by MIT Kerberos was missing a condition for granting the "forwardable" flag on S4U2Self tickets. Fixing this mistake required adding a special case for the check_allowed_to_delegate() function: If the target service argument is NULL, then it means the KDC is probing for general constrained delegation rules and not checking a specific S4U2Proxy request. In FreeIPA 4.11.0, the behavior of ipadb_match_acl() was modified to match the changes from upstream MIT Kerberos 1.20. However, a mistake resulting in this mechanism applies in cases where the target service argument is set AND where it is unset. This results in S4U2Proxy requests being accepted regardless of whether or not there is a matching service delegation rule.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS