Security readout for executives and security teams
This is a legacy Novell eDirectory denial-of-service issue. A remote attacker could crash the NCP daemon by sending malformed NCP fragments with a negative length. The business impact is potential directory service interruption, not confirmed data theft or code execution from the supplied sources. Exposure is most likely in legacy Novell eDirectory deployments running the named pre-fix versions with NCP reachable from untrusted networks. Modern environments without Novell eDirectory, or with upgraded versions, are unlikely to be affected based on the supplied evidence. Treat as a legacy resilience risk. Prioritize if eDirectory supports authentication, identity, or business-critical directory functions, especially where NCP is exposed beyond trusted networks. No active exploitation is evidenced in the provided sources. Mitigation focus: Identify any Novell eDirectory systems and their exact versions.; Upgrade 8.7.3 deployments to SP9 or later per vendor guidance.; Upgrade 8.8.x deployments to 8.8.1 FTF2 or later per vendor guidance..
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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CVE-2006-4520 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
- novell-edirectory-ncp-dos(33921)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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