Security readout for executives and security teams
A very old flaw in Sun Solaris NIS+ (the network directory service used on Unix systems in the late 1990s) let attackers register malicious NIS+ servers through the nis_cachemgr component. If exploited, systems could be tricked into trusting an attacker-controlled directory, undermining authentication and name lookups. This CVE dates to 1999 and applies to legacy Solaris deployments. Exposure is limited to legacy Solaris hosts still running NIS+ with nis_cachemgr. Modern enterprises should have retired NIS+ years ago in favor of LDAP or Active Directory, so real-world exposure today is expected to be rare and confined to unmaintained legacy environments or historical research systems. Low priority for most organizations in 2026. Only relevant if legacy Solaris NIS+ infrastructure remains in production. If so, treat as part of a broader legacy retirement program rather than an emergency patch cycle. Mitigation focus: Inventory any remaining Solaris systems and confirm whether NIS+ or nis_cachemgr is in use.; Consult the referenced Sun security bulletin 00155 and Oracle legacy advisories for patch guidance.; Migrate legacy directory services off NIS+ to LDAP or Active Directory where feasible..
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-1999-0300 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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