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.
02 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.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.32% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 83.0% of scored records. A rank, not a probability.
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-16.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2012-10-22 23:00Z14 YR AGO
- Last updated
- 2024-08-06 20:35Z2 YR AGO
- Reserved
- 2012-08-21
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.1
- Document digest
- 82be612830a9815d5534ed7809d2c4660cd90cda01390fd9bf479441beb9fa0d
05 Affected products
06 References
- exchange.xforce.ibmcloud.comfwknop-ipaddress-dos(79568)https://exchange.xforce.ibmcloud.com/vulnerabilities/79568
- www.openwall.com[oss-security] 20120919 CVE Request -- fwknop 2.0.3: Multiple security issueshttp://www.openwall.com/lists/oss-security/2012/09/19/2
- www.openwall.com[oss-security] 20120919 Re: CVE Request -- fwknop 2.0.3: Multiple security issueshttp://www.openwall.com/lists/oss-security/2012/09/20/4
- www.cipherdyne.orghttp://www.cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.html
- www.cipherdyne.orghttp://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=263fa01f2af1d336961df320f1c7a9ea84ddac9a
- www.cipherdyne.orghttp://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=f4c16bc47fc24a96b63105556b62d61c1ba7d799
- www.openwall.com[oss-security] 20120919 Re: CVE Request -- fwknop 2.0.3: Multiple security issueshttp://www.openwall.com/lists/oss-security/2012/09/20/2
07 Fixed in
Debian 12
- fwknop Fixed in 2.0.3-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- fwknop Fixed in 2.0.3-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- fwknop Fixed in 2.0.3-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.