CVE-2012-4435
MEDIUM · CVSS 4.0EPSS 2.3%EU EUVD
fwknop before 2.0.3 does not properly validate IP addresses, which allows remote authenticated users to cause a denial of service (server crash) via a long IP address.
Key facts
- CVSS score
- 4.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:S/C:N/I:N/A:P- Weakness (CWE)
- CWE-20
- EPSS score
- 2.3% (84th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2012-4369)
- Published
- October 22, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2012-4369 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- cipherdyne / fwknop
- cipherdyne / fwknop
- cipherdyne / fwknop
References
- http://www.cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.html(Vendor Advisory)
- http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=263fa01f2af1d336961df320f1c7a9ea84ddac9a
- http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=f4c16bc47fc24a96b63105556b62d61c1ba7d799
- http://www.openwall.com/lists/oss-security/2012/09/19/2
- http://www.openwall.com/lists/oss-security/2012/09/20/2
- http://www.openwall.com/lists/oss-security/2012/09/20/4
- https://exchange.xforce.ibmcloud.com/vulnerabilities/79568
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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