What’s Vulnerable › Vulnerabilities

CVE-2023-36054

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-07 · updated 2026-06-17
• Weakness: CWE-824

Description

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.

Affected products

• Debian Linux: 10.0
• MIT Kerberos 5: before 1.20.2; 1.21, 1.21-beta1 — fixed in 1.20.2
• Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
• Clustered Data ONTAP: 9.0
• NetApp Hci: all versions
• NetApp Management Services For Element Software: all versions
• NetApp Ontap Tools: all versions

How to fix

Upgrade to a fixed version: MIT Kerberos 5 1.20.2. Check the vendor advisory for mitigations.

References

• https://github.com/krb5/krb5/commit/ef08b09c9459551aabbe7924fb176f1583053cdd
• https://github.com/krb5/krb5/compare/krb5-1.20.1-final...krb5-1.20.2-final
• https://github.com/krb5/krb5/compare/krb5-1.21-final...krb5-1.21.1-final
• https://lists.debian.org/debian-lts-announce/2023/10/msg00031.html
• https://security.netapp.com/advisory/ntap-20230908-0004/
• https://web.mit.edu/kerberos/www/advisories/
• https://github.com/krb5/krb5/commit/ef08b09c9459551aabbe7924fb176f1583053cdd
• https://github.com/krb5/krb5/compare/krb5-1.20.1-final...krb5-1.20.2-final
• https://github.com/krb5/krb5/compare/krb5-1.21-final...krb5-1.21.1-final
• https://lists.debian.org/debian-lts-announce/2023/10/msg00031.html
• https://security.netapp.com/advisory/ntap-20230908-0004/
• https://web.mit.edu/kerberos/www/advisories/

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