Security readout for executives and security teams
This is an old but serious IRC server flaw. A remote user could crash the IRC daemon, and the CVE description says arbitrary code execution is possible, by abusing the LINKS command when flatten_links is disabled. Business urgency depends on whether legacy IRCD-hybrid, ircd-ratbox, or oftc-hybrid servers remain exposed. Exposure is most likely in legacy IRC infrastructure running the named daemon versions, especially internet-facing services with flatten_links disabled. Modern systems are likely unaffected unless they retain old packages, forked builds, or frozen appliance images. Treat as high priority only where legacy IRC servers are still deployed or externally reachable. The potential impact is severe, but the technology scope is narrow and the available bundle provides no evidence of current exploitation. Mitigation focus: Upgrade ircd-ratbox to 2.2.9 or later if present.; Upgrade oftc-hybrid to 1.6.8 or later if present.; Apply Debian DSA-1980 or equivalent vendor security packages for IRCD-hybrid..
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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ATT&CK lookup starting points
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Execution behavior lookup
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Open ATT&CK lookupCVE-2009-4016 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- 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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