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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 73.9%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 73.86% probability · 99th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125, CWE-787
- Affected
- samba/samba · debian/debian linux · canonical/ubuntu linux · synology/diskstation manager · fedoraproject/fedora · redhat/codeready linux builder · redhat/gluster storage · redhat/virtualization host · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux eus · redhat/enterprise linux for ibm z systems · redhat/enterprise linux for ibm z systems eus · redhat/enterprise linux for power big endian · redhat/enterprise linux for power little endian · redhat/enterprise linux for power little endian eus · redhat/enterprise linux for scientific computing · redhat/enterprise linux resilient storage · redhat/enterprise linux server · redhat/enterprise linux server aus · +3 more
- Source
- secalert@redhat.com
References
- https://bugzilla.samba.org/show_bug.cgi?id=14914
- https://kb.cert.org/vuls/id/119678
- https://security.gentoo.org/glsa/202309-06
- https://www.samba.org/samba/security/CVE-2021-44142.html
- https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin
- https://bugzilla.samba.org/show_bug.cgi?id=14914
- https://kb.cert.org/vuls/id/119678
- https://security.gentoo.org/glsa/202309-06
- https://www.kb.cert.org/vuls/id/119678
- https://www.samba.org/samba/security/CVE-2021-44142.html
- https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.