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CVE-2011-3380

19
FAUCET Score

CVE-2011-3380 describes a denial-of-service vulnerability affecting Openswan versions 2.6.29 through 2.6.35. An unauthenticated remote attacker can crash the pluto IKE daemon by sending a crafted ISAKMP message with an invalid KEY_LENGTH attribute, leading to a NULL pointer dereference. This vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and no authentication required, resulting in a partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.6.29CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.6.29:*:*:*:*:*:*:*
2.6.30CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.6.30:*:*:*:*:*:*:*
2.6.31CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.6.31:*:*:*:*:*:*:*
2.6.32CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.6.32:*:*:*:*:*:*:*
2.6.33CPE matchmatch criteria
cpe:2.3:a:xelerance:openswan:2.6.33:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.27%
Probability of exploitation in next 30 days
EPSS Percentile
81.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0227 is in the 71st percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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 (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: openswan-0:2.6.32-4.el6_1.2
View patch

Vendor Advisories (1)

redhatCVE-2011-3380Moderate

openswan: IKE invalid key length allows remote unauthenticated user to crash openswan

Oct 5, 2011

References

secunia.com / advisories/46306
openswan.org / download/CVE-2011-3380/CVE-2011-3380.txt
Patch
redhat.com / support/errata/RHSA-2011-1356.html