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

Technical Analysis