CVE-2011-4073

Use-after-free vulnerability in the cryptographic helper handler functionality in Openswan 2.3.0...

4.0 MediumFix available

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.

Exploit likelihood

2.09%Up 0.8 points since Feb 4, 2022

What each source reports

NVD Score used 4.0

Record: CVE-2011-4073
CVSS 2.0: 4.0 MediumAV:N/AC:L/Au:S/C:N/I:N/A:P
Weakness: CWE-399
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-4073
Updated: 2026-11-02

EUVDEUVD-2011-4025 No score

Record: EUVD-2011-4025
Updated: 2026-11-03

GitHub AdvisoriesGHSA-p53h-4vvv-85x4 No score

Use-after-free vulnerability in the cryptographic helper handler functionality in Openswan 2.3.0...

Record: GHSA-p53h-4vvv-85x4
Updated: 2026-11-02

Affected products

xelerance openswan

Affected packages

Affected packages
Package	Affected	Fixed
`openswan` Debian:6.0	before 1:2.6.28+dfsg-5+squeeze1, plus listed versions 1:2.6.28+dfsg-51:2.6.28+dfsg-5+squeeze1~bpo50+1	1:2.6.28+dfsg-5+squeeze1
`openswan` Debian:5.0	before 1:2.4.12+dfsg-1.3+lenny4, plus listed versions 1:2.4.12+dfsg-1.31:2.4.12+dfsg-1.3+lenny11:2.4.12+dfsg-1.3+lenny21:2.4.12+dfsg-1.3+lenny3	1:2.4.12+dfsg-1.3+lenny4
`openswan` Red Hat:enterprise_linux:5::client	before 0:2.6.21-5.el5_7.6	0:2.6.21-5.el5_7.6
`openswan-debuginfo` Red Hat:enterprise_linux:5::client	before 0:2.6.21-5.el5_7.6	0:2.6.21-5.el5_7.6
`openswan-doc` Red Hat:enterprise_linux:5::client	before 0:2.6.21-5.el5_7.6	0:2.6.21-5.el5_7.6
`openswan` Red Hat:enterprise_linux:5::server	before 0:2.6.21-5.el5_7.6	0:2.6.21-5.el5_7.6
`openswan-debuginfo` Red Hat:enterprise_linux:5::server	before 0:2.6.21-5.el5_7.6	0:2.6.21-5.el5_7.6
`openswan-doc` Red Hat:enterprise_linux:5::server	before 0:2.6.21-5.el5_7.6	0:2.6.21-5.el5_7.6
`openswan` Red Hat:enterprise_linux:6::server	before 0:2.6.32-4.el6_1.4	0:2.6.32-4.el6_1.4
`openswan-debuginfo` Red Hat:enterprise_linux:6::server	before 0:2.6.32-4.el6_1.4	0:2.6.32-4.el6_1.4
`openswan-doc` Red Hat:enterprise_linux:6::server	before 0:2.6.32-4.el6_1.4	0:2.6.32-4.el6_1.4

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-4073 is a medium vulnerability (CVSS 4.0) in Xelerance Openswan, published November 17, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.09%, the 81st percentile. Fixed in openswan 1:2.6.28+dfsg-5+squeeze1.

References

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