CVE-2012-4435

MEDIUM 4.0CVE-2012-4435 · Published 22/10/2012 · updated 16/06/2026

In short

CVE-2012-4435 is a MEDIUM (CVSS 4.0) vulnerability affecting fwknop (cipherdyne).
Chance of exploitation in the next 30 days (EPSS): 2.3%, higher than 83.6% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
fwknop cipherdyne	`= 2.0= 2.0.1≤ 2.0.2`	No fix yet

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.

References

cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.html · Vendor Advisory
cipherdyne.org/cgi-bin/gitweb.cgi
cipherdyne.org/cgi-bin/gitweb.cgi
openwall.com/lists/oss-security/2012/09/19/2
openwall.com/lists/oss-security/2012/09/20/2
openwall.com/lists/oss-security/2012/09/20/4
exchange.xforce.ibmcloud.com/vulnerabilities/79568

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