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CVE-2017-6594

Publication date 28 August 2017

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

The transit path validation code in Heimdal before 7.3 might allow attackers to bypass the capath policy protection mechanism by leveraging failure to add the previous hop realm to the transit path of issued tickets.

Read the notes from the security team

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
Not affected
18.10 cosmic
Not affected
18.04 LTS bionic
Not affected
17.10 artful
Not affected
17.04 zesty Ignored end of life
16.10 yakkety Ignored end of life
16.04 LTS xenial Ignored regressions likely
14.04 LTS trusty Ignored regressions likely
12.04 LTS precise Ignored end of life

Notes

ratliff

Upstream: "[the fix] may break sites that rely on the bug."

mdeslaur

heimdal-kdc package is in universe

ccdm94

in the commit that fixes this issue, upstream mentions that there might be applications that use this bug as a "feature" when sometimes authenticating in cross-realm configurations, meaning that applying the proposed fix could end up breaking said applications. In order to avoid regressions for applications that use heimdal in xenial and earlier, this issue will be marked as ignored for those releases.

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 Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N