VulnerabilityModified
CVE-2012-4435
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.
MEDIUM 4.0EPSS 2.33%
Does this matter?
Lower severity and a low EPSS score (2.33%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 2.0
- 4.0 MEDIUMAV:N/AC:L/Au:S/C:N/I:N/A:P
- EPSS
- 2.33% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- cipherdyne/fwknop
- Source
- secalert@redhat.com
EPSS 2.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.htmlVendor 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
- http://www.cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.htmlVendor 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.