CVE-2017-11462

Publication date 13 September 2017

Last updated 25 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

Description

Double free vulnerability in MIT Kerberos 5 (aka krb5) allows attackers to have unspecified impact via vectors involving automatic deletion of security contexts on error.

From the Ubuntu Security Team

It was discovered that Kerberos incorrectly handled deletion of security contexts. An attacker could possibly use this issue to cause a denial of service or other unspecified impact.

Status

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
Not affected
18.04 LTS bionic
Not affected
17.10 artful Ignored end of life
17.04 zesty 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

Patch details

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

Package Patch details
krb5

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Other references

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