CVE-2024-3183

Summary

A vulnerability was found in FreeIPA in a way when a Kerberos TGS-REQ is encrypted using the client’s session key. This key is different for each new session, which protects it from brute force attacks. However, the ticket it contains is encrypted using the target principal key directly. For user principals, this key is a hash of a public per-principal randomly-generated salt and the user’s password.

If a principal is compromised it means the attacker would be able to retrieve tickets encrypted to any principal, all of them being encrypted by their own key directly. By taking these tickets and salts offline, the attacker could run brute force attacks to find character strings able to decrypt tickets when combined to a principal salt (i.e. find the principal’s password).

Affected Software

VendorProductVersion RangeStatus
4.12.1unaffected
Red HatRed Hat Enterprise Linux 70:4.6.8-5.el7_9.17 < *unaffected
Red HatRed Hat Enterprise Linux 88100020240528133707.823393f5 < *unaffected
Red HatRed Hat Enterprise Linux 8.2 Advanced Update Support8020020240530191103.792f4060 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support8040020240528055121.5b01ab7e < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Telecommunications Update Service8040020240528055121.5b01ab7e < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Update Services for SAP Solutions8040020240528055121.5b01ab7e < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support8060020240530061719.ada582f1 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Service8060020240530061719.ada582f1 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutions8060020240530061719.ada582f1 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Extended Update Support8080020240530051744.b0a6ceea < *unaffected
Red HatRed Hat Enterprise Linux 90:4.11.0-15.el9_4 < *unaffected
Red HatRed Hat Enterprise Linux 9.0 Extended Update Support0:4.9.8-11.el9_0.3 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Extended Update Support0:4.10.1-12.el9_2.2 < *unaffected

Weaknesses

  • CWE-916: Use of Password Hash With Insufficient Computational Effort

Workarounds

To mitigate this vulnerability, ticket requests to user principals are now disallowed in FreeIPA realms by default. This will keep attackers from obtaining data encrypted with the user key directly.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

CVE Program Container

Additional References

References