Security readout for executives and security teams
A very old flaw in the nnrpd component of the INN news server (versions up to 1.6) let remote users overflow a memory buffer and run commands on the server. The vulnerability dates to the late 1990s, when INN was widely deployed for Usenet. For a modern organization, the practical concern is limited to legacy or forgotten news infrastructure that may still be reachable. Exposure is limited to systems still running InterNetNews (INN) 1.6 or earlier with nnrpd reachable, typically on TCP/119. Such deployments are rare in modern enterprise environments and are most likely to be found in legacy Unix hosts, academic infrastructure, or unmaintained servers rather than mainstream production. Low business priority for most organizations because INN 1.6 predates modern deployments; however, any surviving legacy news server exposed to the internet should be treated as urgent to retire or upgrade. Mitigation focus: Upgrade INN to a currently supported release from ISC or the distribution vendor.; Restrict nnrpd (TCP/119) access to trusted networks with firewall or ACL rules.; Retire unused Usenet/NNTP services rather than keeping legacy daemons online..
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-1999-0247 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
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Source materials
- CVE List V5 sourceCVE List V5
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CWE details
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