CVE-2009-1957
MEDIUM · CVSS 5.0EPSS 2.9%EU EUVD
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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P- Weakness (CWE)
- CWE-399
- EPSS score
- 2.9% (87th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-1952)
- Published
- June 8, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-1952 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- strongswan / strongswan
- strongswan / strongswan
- strongswan / strongswan
- strongswan / strongswan
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- strongswan / strongswan
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- strongswan / strongswan
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- strongswan / strongswan
- strongswan / strongswan
- strongswan / strongswan
- strongswan / strongswan
and 20 more…
References
- http://download.strongswan.org/CHANGES4.txt(Patch)
- http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.patch(Patch)
- http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.readme(Vendor Advisory)
- 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
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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