CVE-2009-1957

mediumpriority · track · 21EPSS 0.029 · 87 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.95% (87th) EPSS

CVSS 5 · medium

Is it mine?

71 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USprimary

affected products (71)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
strongswan strongswan≤ 4.3.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.0.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.0.1nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.0.2nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.1.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.1.1nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.1.2nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.1.3nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.1.4nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.1.5nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.2.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.2.1nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.2.2nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.3.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.3.1nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.3.2nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.4.0nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.4.0anvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
strongswan strongswan= 2.4.1nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*

showing 20 of 71

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2009-06-08modified 2026-06-16

related (3,726)

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+3721 more

references (20)

External citations — patches, advisories, analysis.

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