CVE-2009-1957

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-06-08 · updated 2026-06-16
Weakness: CWE-399

Description

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.

Affected products

strongSwan: through 4.3.0; 2.0.0, 2.0.1, 2.0.2, 2.1.0, 2.1.1, 2.1.2 (+63)

References

http://download.strongswan.org/CHANGES4.txt
http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.patch
http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.readme
http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
http://secunia.com/advisories/35296
http://secunia.com/advisories/35685
http://secunia.com/advisories/36922
http://www.debian.org/security/2009/dsa-1899
http://www.securityfocus.com/bid/35178
https://lists.strongswan.org/pipermail/users/2009-May/003457.html
http://download.strongswan.org/CHANGES4.txt
http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.patch

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