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CVE-2011-4073

17
FAUCET Score

CVE-2011-4073 is a use-after-free vulnerability affecting Openswan versions 2.3.0 through 2.6.36. This flaw allows remote authenticated users to trigger a denial of service by crashing the pluto IKE daemon through specific functions. The vulnerability has a CVSS score of 4.0, indicating a low severity, as it requires authentication and only leads to availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.3.0CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.3.0:*:*:*:*:*:*:*
2.3.1CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.3.1:*:*:*:*:*:*:*
2.4.0CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.4.0:*:*:*:*:*:*:*
2.4.1CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.4.1:*:*:*:*:*:*:*
2.4.2CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.4.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.0MEDIUM

AV:N/AC:L/Au:S/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.09%
Probability of exploitation in next 30 days
EPSS Percentile
79.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0209 is in the 91st percentile among its peer group of 21,957 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: openswan-0:2.6.21-5.el5_7.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: openswan-0:2.6.32-4.el6_1.4
View patch

Vendor Advisories (1)

redhatCVE-2011-4073Moderate

openswan: use-after-free vulnerability leads to DoS

Oct 28, 2011

References

secunia.com / advisories/46678
Vendor Advisory
secunia.com / advisories/46681
Vendor Advisory
secunia.com / advisories/47342
Vendor Advisory
debian.org / security/2011/dsa-2374
openswan.org / download/CVE-2011-4073/CVE-2011-4073.txt
redhat.com / support/errata/RHSA-2011-1422.html
securityfocus.com / bid/50440
securitytracker.com / id