Security readout for executives and security teams
A very old flaw in the Exim mail server allowed anyone with a local account to become root by putting an oversized :include: entry in their .forward file. It affects legacy Exim 1.62 and is a historical bug rather than a live threat for modern systems, but any lingering unpatched legacy host would be at risk of full takeover by an internal user. Exposure today is very low. Modern Exim releases superseded 1.62 by over two decades. Only systems still running late-1990s Exim on multi-user hosts would be affected, and such systems should already have been upgraded or decommissioned. Low urgency for typical modern environments; treat as hygiene. If any legacy Unix mail relay from the 1990s is still in service, escalate to high priority because a local user could gain full root control of that host. Mitigation focus: Upgrade any legacy Exim 1.x installations to a currently supported Exim release from the vendor.; Retire or isolate multi-user Unix hosts still running late-1990s mail daemons.; Restrict local shell access on mail-handling hosts to trusted administrators only..
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-1999-0971 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
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Source materials
- CVE List V5 sourceCVE List V5
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CWE details
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