Security readout for executives and security teams
This is an older denial-of-service issue in FileZilla FTP Server before 0.9.6. If MODE Z compression is enabled, certain uploads or directory listings can send the server into an infinite loop, disrupting FTP availability. The provided sources do not show data theft, code execution, or active exploitation. Exposure is likely limited to legacy FileZilla FTP Server deployments older than 0.9.6 with MODE Z compression enabled and reachable by untrusted FTP clients. Modern or upgraded deployments are not shown as affected in the supplied sources. Treat this as a targeted legacy-service availability risk. It should not outrank actively exploited or code-execution vulnerabilities, but any internet-facing vulnerable FTP service should be upgraded or retired promptly. Mitigation focus: Identify any FileZilla FTP Server deployments and confirm versions.; Upgrade vulnerable servers to 0.9.6 or later per vendor release guidance.; If upgrade is delayed, check vendor guidance on disabling MODE Z compression..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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CVE-2005-0851 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
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- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
Products and packages named in the record
CWE details
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