CVE-2011-4073: n/a vulnerability

CVE-2011-4073: Use-after-free vulnerability in the cryptographic helper handler functionality in Openswan 2.3.0 through 2....

Use-after-free vulnerability in the cryptographic helper handler functionality in Openswan 2.3.0 through 2.6.36 allows remote authenticated users to cause a denial of service (pluto IKE daemon crash) via vectors related to the (1) quick_outI1_continue and (2) quick_outI1 functions.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 23:53 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2011-4073 is a crash bug in Openswan, an IPsec VPN component. A remote authenticated user could trigger a failure in the pluto IKE daemon, disrupting VPN negotiation. The sources describe denial of service, not data theft or remote code execution. Exposure is most likely in legacy systems still running Openswan 2.3.0 through 2.6.36 for IPsec VPN services. Internet-facing or partner-facing VPN gateways are more relevant, but the source states authentication is required before exploitation. Handle as a targeted legacy VPN availability issue. It deserves prompt inventory and patch verification if Openswan is still used, but the authenticated prerequisite and denial-of-service-only impact keep it below emergency priority absent local exposure evidence. Mitigation focus: Identify any Openswan deployments and installed versions.; Apply vendor-provided Openswan security updates from Debian, Red Hat, or upstream guidance.; Prioritize VPN gateways exposed to remote users or third-party peers..

Prepared: Jun 27, 2026, 17:48 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: Nov 17, 2011, 19:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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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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