CVE-2011-4073

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.

Published: 2011-11-17 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4073 is rated Moderate Risk (43/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.15%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-4073

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-05-30 1.25% 1.15% -0.10%
2 2025-03-30 2.03% 1.25% -0.79%
3 2025-03-29 — 2.03% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4073

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2011-4073

OS Trackers for CVE-2011-4073

vendor priority summary link
gentoo normal CVE-2011-4073: 1 GLSA(s) (201203-13), 1 atom(s) (net-misc/openswan); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-4073
redhat medium — https://access.redhat.com/security/cve/CVE-2011-4073
ubuntu low CVE-2011-4073 low priority: Ubuntu including 1 source packages (openswan), 10 status rows across 10 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, upstream): not-affected 4, ignored 3, released 3. https://ubuntu.com/security/CVE-2011-4073

Affected software / configurations for CVE-2011-4073

Vendor Product Version Raw CPE
xelerance openswan 2.3.0 cpe:2.3:a:xelerance:openswan:2.3.0:*:*:*:*:*:*:*
xelerance openswan 2.3.1 cpe:2.3:a:xelerance:openswan:2.3.1:*:*:*:*:*:*:*
xelerance openswan 2.4.0 cpe:2.3:a:xelerance:openswan:2.4.0:*:*:*:*:*:*:*
xelerance openswan 2.4.1 cpe:2.3:a:xelerance:openswan:2.4.1:*:*:*:*:*:*:*
xelerance openswan 2.4.2 cpe:2.3:a:xelerance:openswan:2.4.2:*:*:*:*:*:*:*
xelerance openswan 2.4.3 cpe:2.3:a:xelerance:openswan:2.4.3:*:*:*:*:*:*:*
xelerance openswan 2.4.4 cpe:2.3:a:xelerance:openswan:2.4.4:*:*:*:*:*:*:*
xelerance openswan 2.4.5 cpe:2.3:a:xelerance:openswan:2.4.5:*:*:*:*:*:*:*
xelerance openswan 2.4.6 cpe:2.3:a:xelerance:openswan:2.4.6:*:*:*:*:*:*:*
xelerance openswan 2.4.7 cpe:2.3:a:xelerance:openswan:2.4.7:*:*:*:*:*:*:*
xelerance openswan 2.4.8 cpe:2.3:a:xelerance:openswan:2.4.8:*:*:*:*:*:*:*
xelerance openswan 2.4.9 cpe:2.3:a:xelerance:openswan:2.4.9:*:*:*:*:*:*:*
xelerance openswan 2.4.10 cpe:2.3:a:xelerance:openswan:2.4.10:*:*:*:*:*:*:*
xelerance openswan 2.4.11 cpe:2.3:a:xelerance:openswan:2.4.11:*:*:*:*:*:*:*
xelerance openswan 2.4.12 cpe:2.3:a:xelerance:openswan:2.4.12:*:*:*:*:*:*:*
xelerance openswan 2.4.13 cpe:2.3:a:xelerance:openswan:2.4.13:*:*:*:*:*:*:*
xelerance openswan 2.5.0 cpe:2.3:a:xelerance:openswan:2.5.0:*:*:*:*:*:*:*
xelerance openswan 2.5.0 cpe:2.3:a:xelerance:openswan:2.5.0:sbs4:*:*:*:*:*:*
xelerance openswan 2.5.0 cpe:2.3:a:xelerance:openswan:2.5.0:sbs5:*:*:*:*:*:*
xelerance openswan 2.5.01 cpe:2.3:a:xelerance:openswan:2.5.01:*:*:*:*:*:*:*
xelerance openswan 2.5.02 cpe:2.3:a:xelerance:openswan:2.5.02:*:*:*:*:*:*:*
xelerance openswan 2.5.03 cpe:2.3:a:xelerance:openswan:2.5.03:*:*:*:*:*:*:*
xelerance openswan 2.5.04 cpe:2.3:a:xelerance:openswan:2.5.04:*:*:*:*:*:*:*
xelerance openswan 2.5.05 cpe:2.3:a:xelerance:openswan:2.5.05:*:*:*:*:*:*:*
xelerance openswan 2.5.06 cpe:2.3:a:xelerance:openswan:2.5.06:*:*:*:*:*:*:*
xelerance openswan 2.5.07 cpe:2.3:a:xelerance:openswan:2.5.07:*:*:*:*:*:*:*
xelerance openswan 2.5.08 cpe:2.3:a:xelerance:openswan:2.5.08:*:*:*:*:*:*:*
xelerance openswan 2.5.09 cpe:2.3:a:xelerance:openswan:2.5.09:*:*:*:*:*:*:*
xelerance openswan 2.5.10 cpe:2.3:a:xelerance:openswan:2.5.10:*:*:*:*:*:*:*
xelerance openswan 2.5.11 cpe:2.3:a:xelerance:openswan:2.5.11:*:*:*:*:*:*:*
xelerance openswan 2.5.12 cpe:2.3:a:xelerance:openswan:2.5.12:*:*:*:*:*:*:*
xelerance openswan 2.5.13 cpe:2.3:a:xelerance:openswan:2.5.13:*:*:*:*:*:*:*
xelerance openswan 2.5.14 cpe:2.3:a:xelerance:openswan:2.5.14:*:*:*:*:*:*:*
xelerance openswan 2.5.15 cpe:2.3:a:xelerance:openswan:2.5.15:*:*:*:*:*:*:*
xelerance openswan 2.5.16 cpe:2.3:a:xelerance:openswan:2.5.16:*:*:*:*:*:*:*
xelerance openswan 2.5.17 cpe:2.3:a:xelerance:openswan:2.5.17:*:*:*:*:*:*:*
xelerance openswan 2.5.18 cpe:2.3:a:xelerance:openswan:2.5.18:*:*:*:*:*:*:*
xelerance openswan 2.6.01 cpe:2.3:a:xelerance:openswan:2.6.01:*:*:*:*:*:*:*
xelerance openswan 2.6.02 cpe:2.3:a:xelerance:openswan:2.6.02:*:*:*:*:*:*:*
xelerance openswan 2.6.03 cpe:2.3:a:xelerance:openswan:2.6.03:*:*:*:*:*:*:*
xelerance openswan 2.6.04 cpe:2.3:a:xelerance:openswan:2.6.04:*:*:*:*:*:*:*
xelerance openswan 2.6.05 cpe:2.3:a:xelerance:openswan:2.6.05:*:*:*:*:*:*:*
xelerance openswan 2.6.06 cpe:2.3:a:xelerance:openswan:2.6.06:*:*:*:*:*:*:*
xelerance openswan 2.6.07 cpe:2.3:a:xelerance:openswan:2.6.07:*:*:*:*:*:*:*
xelerance openswan 2.6.08 cpe:2.3:a:xelerance:openswan:2.6.08:*:*:*:*:*:*:*
xelerance openswan 2.6.09 cpe:2.3:a:xelerance:openswan:2.6.09:*:*:*:*:*:*:*
xelerance openswan 2.6.10 cpe:2.3:a:xelerance:openswan:2.6.10:*:*:*:*:*:*:*
xelerance openswan 2.6.11 cpe:2.3:a:xelerance:openswan:2.6.11:*:*:*:*:*:*:*
xelerance openswan 2.6.12 cpe:2.3:a:xelerance:openswan:2.6.12:*:*:*:*:*:*:*
xelerance openswan 2.6.13 cpe:2.3:a:xelerance:openswan:2.6.13:*:*:*:*:*:*:*
xelerance openswan 2.6.14 cpe:2.3:a:xelerance:openswan:2.6.14:*:*:*:*:*:*:*
xelerance openswan 2.6.15 cpe:2.3:a:xelerance:openswan:2.6.15:*:*:*:*:*:*:*
xelerance openswan 2.6.16 cpe:2.3:a:xelerance:openswan:2.6.16:*:*:*:*:*:*:*
xelerance openswan 2.6.17 cpe:2.3:a:xelerance:openswan:2.6.17:*:*:*:*:*:*:*
xelerance openswan 2.6.18 cpe:2.3:a:xelerance:openswan:2.6.18:*:*:*:*:*:*:*
xelerance openswan 2.6.19 cpe:2.3:a:xelerance:openswan:2.6.19:*:*:*:*:*:*:*
xelerance openswan 2.6.20 cpe:2.3:a:xelerance:openswan:2.6.20:*:*:*:*:*:*:*
xelerance openswan 2.6.21 cpe:2.3:a:xelerance:openswan:2.6.21:*:*:*:*:*:*:*
xelerance openswan 2.6.22 cpe:2.3:a:xelerance:openswan:2.6.22:*:*:*:*:*:*:*
xelerance openswan 2.6.23 cpe:2.3:a:xelerance:openswan:2.6.23:*:*:*:*:*:*:*
xelerance openswan 2.6.24 cpe:2.3:a:xelerance:openswan:2.6.24:*:*:*:*:*:*:*
xelerance openswan 2.6.25 cpe:2.3:a:xelerance:openswan:2.6.25:*:*:*:*:*:*:*
xelerance openswan 2.6.26 cpe:2.3:a:xelerance:openswan:2.6.26:*:*:*:*:*:*:*
xelerance openswan 2.6.27 cpe:2.3:a:xelerance:openswan:2.6.27:*:*:*:*:*:*:*
xelerance openswan 2.6.28 cpe:2.3:a:xelerance:openswan:2.6.28:*:*:*:*:*:*:*
xelerance openswan 2.6.29 cpe:2.3:a:xelerance:openswan:2.6.29:*:*:*:*:*:*:*
xelerance openswan 2.6.30 cpe:2.3:a:xelerance:openswan:2.6.30:*:*:*:*:*:*:*
xelerance openswan 2.6.31 cpe:2.3:a:xelerance:openswan:2.6.31:*:*:*:*:*:*:*
xelerance openswan 2.6.32 cpe:2.3:a:xelerance:openswan:2.6.32:*:*:*:*:*:*:*
xelerance openswan 2.6.33 cpe:2.3:a:xelerance:openswan:2.6.33:*:*:*:*:*:*:*
xelerance openswan 2.6.34 cpe:2.3:a:xelerance:openswan:2.6.34:*:*:*:*:*:*:*
xelerance openswan 2.6.35 cpe:2.3:a:xelerance:openswan:2.6.35:*:*:*:*:*:*:*
xelerance openswan 2.6.36 cpe:2.3:a:xelerance:openswan:2.6.36:*:*:*:*:*:*:*

References for CVE-2011-4073

cvelogic Threat Intelligence