{"id":"CVE-2012-4435","url":"https://www.cyber-defence.io/tools/cve/CVE-2012-4435","generatedAt":"2026-10-27T17:58:27.219Z","title":"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.","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.","published":"2012-10-22T23:55:07.000Z","lastModified":"2026-06-16T23:45:05.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":4,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P"},"cwe":["CWE-20"],"affected":["cipherdyne/fwknop"],"epss":{"score":0.02329,"percentile":0.83408,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (2.33%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.html","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=263fa01f2af1d336961df320f1c7a9ea84ddac9a","source":"secalert@redhat.com"},{"url":"http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=f4c16bc47fc24a96b63105556b62d61c1ba7d799","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2012/09/19/2","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2012/09/20/2","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2012/09/20/4","source":"secalert@redhat.com"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/79568","source":"secalert@redhat.com"},{"url":"http://www.cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=263fa01f2af1d336961df320f1c7a9ea84ddac9a","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=f4c16bc47fc24a96b63105556b62d61c1ba7d799","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2012/09/19/2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2012/09/20/2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2012/09/20/4","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/79568","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2012-4435","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}