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Fencer Intel
medium 5.0

CVE-2011-3380 json

Openswan 2.6.29 through 2.6.35 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto IKE daemon crash) v…

published 2011-11-17 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3343

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

Openswan 2.6.29 through 2.6.35 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto IKE daemon crash) via an ISAKMP message with an invalid KEY_LENGTH attribute, which is not properly handled by the error handling function.

Patch / fix

  • openswan RHEL 6 2.6.32-4.el6_1.2

red hat advisories RHSA-2011:1356

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-3380 updated cvss 5.0

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

  • Red Hat Enterprise Linux Server (v. 6) openswan 2.6.32-4.el6_1.2 Red Hat Enterprise Linux Server Optional (v. 6) openswan 2.6.32-4.el6_1.2
    fixed: vendor fix RHSA-2011:1356
  • Red Hat Enterprise Linux 5 openswan
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.27% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.