CVE-2009-1957 json
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer deref…
published 2009-06-06 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1952
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.9%
- EPSS 2.9% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.
Patch / fix
- strongswan Debian 14, Debian 13, Debian 12 4.2.14-1.1
debian advisories DEBIAN-CVE-2009-1957
Exploit prediction
2.95% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-399 Resource Management Errors
References
-
download.strongswan.org
/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.patch
patch
-
download.strongswan.org
/CHANGES4.txt
patch
-
debian.org
/security/2009/dsa-1899
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2009-07/msg00002.html
vendor-advisory
-
download.strongswan.org
/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.readme
vendor-advisory
-
secunia.com
/advisories/35296
third-party-advisory
-
secunia.com
/advisories/36922
third-party-advisory
-
lists.strongswan.org
/pipermail/users/2009-May/003457.html
mailing-list
-
securityfocus.com
/bid/35178
vdb-entry
-
secunia.com
/advisories/35685
third-party-advisory
Sources
- CVE List CVE-2009-1957
- NVD CVE-2009-1957
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