CVE-2012-4435

Severity: medium (CVSS 4.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-10-22 · updated 2026-06-16
Weakness: CWE-20

Description

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.

Affected products

fwknop: through 2.0.2; 2.0, 2.0.1

References

http://www.cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.html
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
http://www.cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.html
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

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