Attacker Value
Unknown
(1 user assessed)
Exploitability
Unknown
(1 user assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Network
1

CVE-2021-44142

Disclosure Date: January 31, 2022
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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1
Ratings
Technical Analysis

A July 2024 bulletin from multiple U.S. government agencies indicates that North Korean state-sponsored attackers have demonstrated interest in this vulnerability — not immediately clear whether it was exploited outright or used in some other capacity: https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-207a

Not on CISA KEV as of August 7, 2024.

CVSS V3 Severity and Metrics
Base Score:
8.8 High
Impact Score:
5.9
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • canonical,
  • debian,
  • fedoraproject,
  • redhat,
  • samba,
  • synology

Products

  • codeready linux builder -,
  • debian linux 10.0,
  • debian linux 11.0,
  • diskstation manager,
  • enterprise linux 7.0,
  • enterprise linux 8.0,
  • enterprise linux desktop 7.0,
  • enterprise linux eus 8.2,
  • enterprise linux eus 8.4,
  • enterprise linux for ibm z systems 7.0,
  • enterprise linux for ibm z systems 8.0,
  • enterprise linux for ibm z systems eus 8.2,
  • enterprise linux for ibm z systems eus 8.4,
  • enterprise linux for power big endian 7.0,
  • enterprise linux for power little endian 7.0,
  • enterprise linux for power little endian 8.0,
  • enterprise linux for power little endian eus 8.2,
  • enterprise linux for power little endian eus 8.4,
  • enterprise linux for scientific computing 7.0,
  • enterprise linux resilient storage 7.0,
  • enterprise linux server 7.0,
  • enterprise linux server 8.1,
  • enterprise linux server aus 8.2,
  • enterprise linux server aus 8.4,
  • enterprise linux server tus 8.2,
  • enterprise linux server tus 8.4,
  • enterprise linux server update services for sap solutions 8.1,
  • enterprise linux server update services for sap solutions 8.2,
  • enterprise linux server update services for sap solutions 8.4,
  • enterprise linux workstation 7.0,
  • fedora 34,
  • fedora 35,
  • gluster storage 3.5,
  • samba,
  • ubuntu linux 14.04,
  • ubuntu linux 16.04,
  • ubuntu linux 18.04,
  • ubuntu linux 20.04,
  • ubuntu linux 21.10,
  • virtualization host 4.0
Technical Analysis