Remote Code Execution in Samba vfs_fruit Module
CVE-2021-44142 is a remote code execution vulnerability in Samba's vfs_fruit module. The flaw affects Samba versions prior to 4.13.17, 4.14.12, and 4.15.5 when vfs_fruit is configured. The module uses extended file attributes (EA/xattr) to provide enhanced interoperability with Apple SMB clients and Netatalk 3 AFP servers. A specially crafted extended file attribute can trigger out-of-bounds heap read and write conditions in vfs_fruit, leading to memory corruption. A remote attacker who can write extended file attributes to a share handled by the vulnerable module can exploit the bug to execute arbitrary code in the smbd process.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A previously addressed Samba vfs_fruit module remote code execution vulnerability mentioned as historical context.
Known vulnerability in Samba’s vfs_fruit module referenced as part of the actor’s CVE research.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.