CVE-2021-44142

Publication date 31 January 2022

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide "...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver." Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
samba	22.04 LTS jammy	Fixed 4.13.17~dfsg-0ubuntu1
	21.10 impish	Fixed 2:4.13.17~dfsg-0ubuntu0.21.10.1
	20.04 LTS focal	Fixed 2:4.13.17~dfsg-0ubuntu0.21.04.1
	18.04 LTS bionic	Fixed 2:4.7.6+dfsg~ubuntu-0ubuntu2.28
	16.04 LTS xenial	Fixed 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm1
	14.04 LTS trusty	Fixed 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm12

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Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.8 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	8.8 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-5260-1
Samba vulnerabilities
1 February 2022

USN-5260-2
Samba vulnerability
1 February 2022

USN-5260-3
Samba vulnerability
3 February 2022