SMB: Samba vfs_fruit Module Out-Of-Bounds Read and Write

This signature detects attempts to exploit a known vulnerability against vfs_fruit module of Samba. A successful attack can lead to arbitrary code execution.

Extended 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.

Affected Products

Redhat enterprise_linux_eus

References

CVE: CVE-2021-44142

URL: http://www.zerodayinitiative.com/advisories/ZDI-22-244/ https://www.samba.org/samba/security/CVE-2021-44142.html http://www.zerodayinitiative.com/advisories/ZDI-22-245/ http://www.zerodayinitiative.com/advisories/ZDI-22-246/

Short Name

SMB:SAMBA:VFS-FRUIT-MUL-OOB-MC

Severity

Major

Recommended

False

Recommended Action

Drop

SMB: Samba vfs_fruit Module Out-Of-Bounds Read and Write

Extended Description

Affected Products

References

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