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CVE-2018-16860

Publication date 14 May 2019

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.

Status

Package Ubuntu Release Status
heimdal 22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco Ignored end of life
18.10 cosmic Ignored end of life
18.04 LTS bionic
Fixed 7.5.0+dfsg-1ubuntu0.1
16.04 LTS xenial
14.04 LTS trusty
samba 22.10 kinetic
Fixed 2:4.10.0+dfsg-0ubuntu2.1
22.04 LTS jammy
Fixed 2:4.10.0+dfsg-0ubuntu2.1
20.04 LTS focal
Fixed 2:4.10.0+dfsg-0ubuntu2.1
19.04 disco
Fixed 2:4.10.0+dfsg-0ubuntu2.1
18.10 cosmic
Fixed 2:4.8.4+dfsg-2ubuntu2.4
18.04 LTS bionic
Fixed 2:4.7.6+dfsg~ubuntu-0ubuntu2.10
16.04 LTS xenial
Fixed 2:4.3.11+dfsg-0ubuntu0.16.04.20
14.04 LTS trusty

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
heimdal

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references