CVE-2011-4577: n/a vulnerability

CVE-2011-4577: OpenSSL before 0.9.8s and 1.x before 1.0.0f, when RFC 3779 support is enabled, allows remote attackers to c...

OpenSSL before 0.9.8s and 1.x before 1.0.0f, when RFC 3779 support is enabled, allows remote attackers to cause a denial of service (assertion failure) via an X.509 certificate containing certificate-extension data associated with (1) IP address blocks or (2) Autonomous System (AS) identifiers.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 00:09 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2011-4577 is an OpenSSL denial-of-service issue. A specially crafted X.509 certificate with IP address block or Autonomous System identifier extension data can crash vulnerable OpenSSL builds, but only when RFC 3779 support is enabled. Exposure is most likely in legacy systems using OpenSSL 0.9.8 or early 1.0.0 builds with RFC 3779 support enabled. Modern supported distributions are unlikely to remain affected, but embedded, appliance, or vendor-pinned OpenSSL stacks need verification. Treat this as a legacy exposure cleanup item unless affected internet-facing certificate-processing systems are found. Priority rises for unsupported platforms, network appliances, or services that accept untrusted certificates and still use vulnerable OpenSSL builds. Mitigation focus: Upgrade OpenSSL to 0.9.8s, 1.0.0f, or later where applicable.; Prefer supported vendor packages rather than manually replacing bundled OpenSSL libraries.; Check vendor advisories for legacy appliances, operating systems, and embedded products..

Prepared: Jun 27, 2026, 17:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jan 6, 2012, 01:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

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CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

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Weakness

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