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CVE-2020-25721

Publication date 9 November 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.8 · High

Score breakdown

Kerberos acceptors need easy access to stable AD identifiers (eg objectSid). Samba as an AD DC now provides a way for Linux applications to obtain a reliable SID (and samAccountName) in issued tickets.

Read the notes from the security team

Status

Package Ubuntu Release Status
samba 23.04 lunar
Fixed 2:4.13.14+dfsg-0ubuntu1
22.10 kinetic
Fixed 2:4.13.14+dfsg-0ubuntu1
22.04 LTS jammy
Fixed 2:4.13.14+dfsg-0ubuntu1
21.10 impish
Fixed 2:4.13.14+dfsg-0ubuntu0.21.10.1
21.04 hirsute
Fixed 2:4.13.14+dfsg-0ubuntu0.21.04.1
20.04 LTS focal
Fixed 2:4.13.14+dfsg-0ubuntu0.20.04.1
18.04 LTS bionic Ignored changes too intrusive
16.04 LTS xenial Ignored changes too intrusive
14.04 LTS trusty Ignored changes too intrusive

Notes

mdeslaur

Fixing this in Ubuntu 18.04 LTS would require substantial code backports. We will not be fixing this issue in Ubuntu 18.04 LTS. In environments where this is of concern, we recommend updating to a more recent Ubuntu version.

Severity score breakdown

Parameter Value
Base score 8.8 · High
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H