Security readout for executives and security teams
This is an old VPN authentication bypass affecting FreeS/WAN-related IPsec software. A remote attacker could present a spoofed PKCS#7 certificate and be accepted as trusted, potentially gaining VPN access without a legitimate certificate. Business urgency depends on whether any legacy VPN gateways still run these versions. Exposure is most likely in legacy Linux IPsec VPN gateways or appliances derived from FreeS/WAN, Openswan, superfreeswan, or early strongSwan. Modern deployments are unlikely to be affected unless old packages remain in production, embedded systems, archived appliances, or unmanaged remote-access infrastructure. Prioritize if any internet-facing or partner-facing VPN infrastructure still uses affected legacy IPsec software. If none exists, record the assessment and close as not applicable. Because the flaw affects authentication, confirmed exposure should be treated as a high-priority legacy infrastructure risk. Mitigation focus: Inventory IPsec VPN gateways for FreeS/WAN, superfreeswan, Openswan, and strongSwan versions.; Upgrade Openswan to 1.0.6, 2.1.4, or later where applicable.; Upgrade strongSwan to 2.1.3 or later where applicable..
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-2004-0590 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
- ipsec-verifyx509cert-auth-bypass(16515)CVE reference · vdb-entry, x_refsource_XF
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.