CVE-2023-36054 — lib/kadm5/kadm_rpc_xdr
lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. A remote authenticated user can trigger a kadmind crash. This occurs because _xdr_kadm5_principal_ent_rec does not validate the relationship between n_key_
Published
2023-08-07T00:00:00.000Z
Last modified
2024-10-11T13:57:10.192Z
01What is this vulnerability?
lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. A remote authenticated user can trigger a kadmind crash. This occurs because _xdr_kadm5_principal_ent_rec does not validate the relationship between n_key_data and the key_data array count.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
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: 2023-08-07T00:00:00.000Z
- Last modified: 2024-10-11T13:57:10.192Z
09References
- web.mit.edu — https://web.mit.edu/kerberos/www/advisories/
- github.com — https://github.com/krb5/krb5/compare/krb5-1.21-final...krb5-1.21.1-final
- github.com — https://github.com/krb5/krb5/compare/krb5-1.20.1-final...krb5-1.20.2-final
- github.com — https://github.com/krb5/krb5/commit/ef08b09c9459551aabbe7924fb176f1583053cdd
- security.netapp.com — https://security.netapp.com/advisory/ntap-20230908-0004/
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/10/msg00031.html
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