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CVE-2021-23192

Publication date 9 November 2021

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 the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.

Read the notes from the security team

Status

Package Ubuntu Release Status
samba 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
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes

mdeslaur

affects 4.10.0 and later

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