High severity · published Feb 21, 2022
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…
8.8
CVSS
73.6%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)73.6% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CL
Codeready Linux Builder · Redhat
All versions, or not specified · source: NVD
DL
Debian Linux · Debian
10.0; 11.0 · source: NVD
DM
Diskstation Manager · Synology
6.2 before 6.2.4-25556.4 · source: NVD
EL
Enterprise Linux · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux Desktop · Redhat
7.0 · source: NVD
EL
Enterprise Linux Eus · Redhat
8.2; 8.4 · source: NVD
EL
Enterprise Linux For Ibm Z Systems · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux For Ibm Z Systems Eus · Redhat
8.2; 8.4 · source: NVD
EL
Enterprise Linux For Power Big Endian · Redhat
7.0 · source: NVD
EL
Enterprise Linux For Power Little Endian · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux For Power Little Endian Eus · Redhat
8.2; 8.4 · source: NVD
EL
Enterprise Linux For Scientific Computing · Redhat
7.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-44142
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-44142
bugzilla.samba.org
https://bugzilla.samba.org/show_bug.cgi?id=14914
kb.cert.org
https://kb.cert.org/vuls/id/119678
security.gentoo.org
https://security.gentoo.org/glsa/202309-06
www.samba.org
https://www.samba.org/samba/security/CVE-2021-44142.html
www.zerodayinitiative.com
https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin
www.kb.cert.org
https://www.kb.cert.org/vuls/id/119678
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