Vulnerability Monitor

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CVE-2021-44142

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.

Published

2022-02-21T15:15:07.380

Last Modified

2025-04-23T19:15:51.880

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: SINGLE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

8.0

Impact Score

10.0

Weaknesses

Type: Secondary
CWE-125
CWE-787
Type: Primary
CWE-125
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	samba	samba	< 4.13.17	Yes
Application	samba	samba	< 4.14.12	Yes
Application	samba	samba	< 4.15.5	Yes
Operating System	debian	debian_linux	10.0	Yes
Operating System	debian	debian_linux	11.0	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	20.04	Yes
Operating System	canonical	ubuntu_linux	21.10	Yes
Application	synology	diskstation_manager	< 6.2.4-25556.4	Yes
Operating System	fedoraproject	fedora	34	Yes
Operating System	fedoraproject	fedora	35	Yes
Application	redhat	codeready_linux_builder	-	Yes
Application	redhat	gluster_storage	3.5	Yes
Application	redhat	virtualization_host	4.0	Yes
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	redhat	enterprise_linux_desktop	7.0	Yes
Operating System	redhat	enterprise_linux_eus	8.2	Yes
Operating System	redhat	enterprise_linux_eus	8.4	Yes
Operating System	redhat	enterprise_linux_for_ibm_z_systems	7.0	Yes
Operating System	redhat	enterprise_linux_for_ibm_z_systems	8.0	Yes
Operating System	redhat	enterprise_linux_for_ibm_z_systems_eus	8.2	Yes
Operating System	redhat	enterprise_linux_for_ibm_z_systems_eus	8.4	Yes
Operating System	redhat	enterprise_linux_for_power_big_endian	7.0	Yes
Operating System	redhat	enterprise_linux_for_power_little_endian	7.0	Yes
Operating System	redhat	enterprise_linux_for_power_little_endian	8.0	Yes
Operating System	redhat	enterprise_linux_for_power_little_endian_eus	8.2	Yes
Operating System	redhat	enterprise_linux_for_power_little_endian_eus	8.4	Yes
Operating System	redhat	enterprise_linux_for_scientific_computing	7.0	Yes
Operating System	redhat	enterprise_linux_resilient_storage	7.0	Yes
Operating System	redhat	enterprise_linux_server	7.0	Yes
Operating System	redhat	enterprise_linux_server	8.1	Yes
Operating System	redhat	enterprise_linux_server_aus	8.2	Yes
Operating System	redhat	enterprise_linux_server_aus	8.4	Yes
Operating System	redhat	enterprise_linux_server_tus	8.2	Yes
Operating System	redhat	enterprise_linux_server_tus	8.4	Yes
Operating System	redhat	enterprise_linux_server_update_services_for_sap_solutions	8.1	Yes
Operating System	redhat	enterprise_linux_server_update_services_for_sap_solutions	8.2	Yes
Operating System	redhat	enterprise_linux_server_update_services_for_sap_solutions	8.4	Yes
Operating System	redhat	enterprise_linux_workstation	7.0	Yes

References

https://bugzilla.samba.org/show_bug.cgi?id=14914 ([email protected])
https://kb.cert.org/vuls/id/119678 ([email protected])
https://security.gentoo.org/glsa/202309-06 ([email protected])
https://www.samba.org/samba/security/CVE-2021-44142.html ([email protected])
https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin ([email protected])
https://bugzilla.samba.org/show_bug.cgi?id=14914 (af854a3a-2127-422b-91ae-364da2661108)
https://kb.cert.org/vuls/id/119678 (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202309-06 (af854a3a-2127-422b-91ae-364da2661108)
https://www.kb.cert.org/vuls/id/119678 (af854a3a-2127-422b-91ae-364da2661108)
https://www.samba.org/samba/security/CVE-2021-44142.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin (af854a3a-2127-422b-91ae-364da2661108)