CVE-2018-5730

Publication date 6 March 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to circumvent a DN containership check by supplying both a "linkdn" and "containerdn" database argument, or by supplying a DN string which is a left extension of a container DN string but is not hierarchically within the container DN.

From the Ubuntu Security Team

It was discovered that Kerberos incorrectly handled certain database arguments. A remote authenticated attacker could possibly use this issue to obtain sensitive information.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
krb5	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Fixed 1.16-2ubuntu1.1
	18.04 LTS bionic	Fixed 1.16-2ubuntu0.1
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Fixed 1.13.2+dfsg-5ubuntu2.1
	14.04 LTS trusty	Fixed 1.12+dfsg-2ubuntu5.4

Severity score breakdown

CVSS version: CVSS v3.0

Base score 3.8 · Low

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality impact	Low
Integrity impact	Low
Availability impact	None

Scores

Parameter	Value
Base score	3.8 · Low
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

References

Other references

https://www.cve.org/CVERecord?id=CVE-2018-5730