CVE-2012-4436

Severity: medium (CVSS 4.4 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% 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-119

Description

Buffer overflow in the run_last_args function in client/fwknop.c in fwknop before 2.0.3, when processing --last, might allow local users to cause a denial of service (client crash) and possibly execute arbitrary code via many .fwknop.run arguments.

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=a60f05ad44e824f6230b22f8976399340cb535dc
http://www.openwall.com/lists/oss-security/2012/09/19/2
http://www.openwall.com/lists/oss-security/2012/09/20/4
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=a60f05ad44e824f6230b22f8976399340cb535dc
http://www.openwall.com/lists/oss-security/2012/09/19/2
http://www.openwall.com/lists/oss-security/2012/09/20/4

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