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CVE-2023-36054

Published: 7 August 2023

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.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
krb5
Launchpad, Ubuntu, Debian
focal
Released (1.17-6ubuntu4.4)
jammy
Released (1.19.2-2ubuntu0.3)
lunar
Released (1.20.1-1ubuntu0.1)
upstream
Released (1.20.1-3)
mantic Not vulnerable
(1.20.1-3ubuntu1)
bionic
Released (1.16-2ubuntu0.4+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
trusty
Released (1.12+dfsg-2ubuntu5.4+esm4)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (1.13.2+dfsg-5ubuntu2.2+esm4)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
Patches:
upstream: https://github.com/krb5/krb5/commit/ef08b09c9459551aabbe7924fb176f1583053cdd

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H