CVE-2011-4073 json
Use-after-free vulnerability in the cryptographic helper handler functionality in Openswan 2.3.0 through 2.6.36 allows remote authenticated…
published 2011-11-17 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4025
- cvss
- 4.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.1%
- EPSS 2.1% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- openswan RHEL 5 2.6.21-5.el5_7.6
- openswan RHEL 6 2.6.32-4.el6_1.4
red hat advisories RHSA-2011:1422
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-2011-4073 updated cvss 4.0
openswan: use-after-free vulnerability leads to DoS
-
Red Hat Enterprise Linux (v. 5 server) openswan 2.6.21-5.el5_7.6 Red Hat Enterprise Linux Desktop (v. 5 client) openswan 2.6.21-5.el5_7.6 Red Hat Enterprise Linux Server (v. 6) openswan 2.6.32-4.el6_1.4 Red Hat Enterprise Linux Server Optional (v. 6) openswan 2.6.32-4.el6_1.4fixed: vendor fix RHSA-2011:1422
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
2.09% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-399 Resource Management Errors
References
-
debian.org
/security/2011/dsa-2374
vendor-advisory
-
redhat.com
/support/errata/RHSA-2011-1422.html
vendor-advisory
-
secunia.com
/advisories/47342
third-party-advisory, vendor-advisory
-
secunia.com
/advisories/46678
third-party-advisory, vendor-advisory
-
secunia.com
/advisories/46681
third-party-advisory, vendor-advisory
-
securityfocus.com
/bid/50440
vdb-entry
- openswan.org /download/CVE-2011-4073/CVE-2011-4073.txt
-
securitytracker.com
/id?1026268
vdb-entry
Sources
- CVE List CVE-2011-4073
- NVD CVE-2011-4073
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.