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

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package	Release	Status
krb5 Launchpad, Ubuntu, Debian	bionic	Released (1.16-2ubuntu0.4+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	focal	Released (1.17-6ubuntu4.4)
	jammy	Released (1.19.2-2ubuntu0.3)
	lunar	Released (1.20.1-1ubuntu0.1)
	mantic	Not vulnerable (1.20.1-3ubuntu1)
	noble	Not vulnerable (1.20.1-3ubuntu1)
	trusty	Released (1.12+dfsg-2ubuntu5.4+esm4) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (1.20.1-3)
	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

References

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