Security readout for executives and security teams
Plain-English summary
CVE-2002-0666 is a denial-of-service flaw in some older IPsec implementations, including FreeS/WAN and KAME. A remote attacker could send malformed ESP traffic that may crash the kernel, disrupting VPN or encrypted network connectivity. The source data does not identify active exploitation or a specific vendor patch.
Executive priority
Treat as a legacy availability risk. Prioritize if the organization still operates old IPsec VPN infrastructure or exposed ESP services. If no FreeS/WAN, KAME, or derivative stack is present, urgency is lower, but validation should be quick.
Technical view
The issue involves incorrect authentication-data length calculation in IPsec ESP handling. Spoofed, short ESP packets can trigger integer signedness errors, leading to kernel panic in affected FreeS/WAN and KAME implementations. Public source data is sparse and lists no CVSS score, CWE, affected versions, or remediation advisory.
Likely exposure
Exposure is most likely in legacy systems using FreeS/WAN or KAME-derived IPsec stacks, especially internet-reachable VPN gateways or hosts accepting ESP traffic. Modern supported IPsec implementations may not be affected, but the provided sources do not confirm affected version ranges.
Exploitation context
The CVE describes remote denial of service through malformed ESP packets. It is not listed as CISA KEV in the provided bundle, and no cited source confirms active exploitation. Impact is availability-focused: kernel panic and service disruption, not documented data theft or code execution.
Researcher notes
The public record is minimal: no CVSS, CWE, version ranges, exploit status, or patch details are provided. Analysis should focus on confirming affected IPsec lineage and obtaining historical vendor advisories before assigning environment-specific severity.
Mitigation direction
- Inventory systems using FreeS/WAN, KAME, or KAME-derived IPsec components.
- Check vendor or operating-system advisories for fixed versions or configuration guidance.
- Replace unsupported legacy IPsec stacks with maintained alternatives where feasible.
- Limit ESP exposure to trusted peers using network controls where operationally possible.
- Monitor VPN and kernel logs for unexpected crashes or malformed IPsec traffic indicators.
Validation and detection
- Confirm whether any production hosts run FreeS/WAN or KAME IPsec code.
- Identify internet-facing systems that accept IPsec ESP traffic.
- Review OS and appliance security advisories for CVE-2002-0666 references.
- Verify whether affected systems have vendor-supported updates or replacements available.
- Document compensating controls for systems that cannot be upgraded.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2002-0666 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
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
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.