CVE-2021-44142

Advisory lineage Upstream: 0 Downstream: 27
Modified
Published: 21 Feb 2022, 14:30
Last modified:23 Apr 2025, 19:02

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9 HIGH
v2.0 (nvd)
EPSS Score
35.7% HIGH
36% probability +9.90%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 Feb 2022, 14:30
Published
Vulnerability first disclosed
23 Apr 2025, 19:02
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 9AV:N/AC:L/Au:S/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 35.70%• Percentile: 97%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 20.04 | 21.10

  • debian•debian_linux

    10.0 | 11.0

  • fedoraproject•fedora

    34 | 35

  • redhat•codeready_linux_builder

    na

  • redhat•enterprise_linux

    7.0 | 8.0

  • redhat•enterprise_linux_desktop

    7.0

  • redhat•enterprise_linux_eus

    8.2 | 8.4

  • redhat•enterprise_linux_for_ibm_z_systems

    7.0 | 8.0

  • redhat•enterprise_linux_for_ibm_z_systems_eus

    8.2 | 8.4

  • redhat•enterprise_linux_for_power_big_endian

    7.0

  • redhat•enterprise_linux_for_power_little_endian

    7.0 | 8.0

  • redhat•enterprise_linux_for_power_little_endian_eus

    8.2 | 8.4

  • redhat•enterprise_linux_for_scientific_computing

    7.0

  • redhat•enterprise_linux_resilient_storage

    7.0

  • redhat•enterprise_linux_server

    7.0 | 8.1

  • redhat•enterprise_linux_server_aus

    8.2 | 8.4

  • redhat•enterprise_linux_server_tus

    8.2 | 8.4

  • redhat•enterprise_linux_server_update_services_for_sap_solutions

    8.1 | 8.2 | 8.4

  • redhat•enterprise_linux_workstation

    7.0

  • redhat•gluster_storage

    3.5

  • redhat•virtualization_host

    4.0

  • samba•samba

    ≥ unspecified, < 4.13.17 | ≥ unspecified, < 4.14.12 | ≥ unspecified, < 4.15.5 | < 4.13.17 | ≥ 4.14.0, < 4.14.12 | ≥ 4.15.0, < 4.15.5

  • synology•diskstation_manager

    ≥ 6.2, < 6.2.4-25556.4

References (6)