PT-2012-5401 · Fwknop · Fwknop

Jan Lieskovsky · Published 2012-10-22 · Updated 2012-11-08 · CVE-2012-4436

Positive Technologies (AI Summary)

CVSS v2.0

4.4

Medium

Base vector

AV:L/AC:M/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions fwknop versions prior to 2.0.3

Description The issue is related to a buffer overflow in the run last args function, which can occur when processing the --last option with many .fwknop.run arguments. This might allow local users to cause a denial of service, resulting in a client crash, and potentially execute arbitrary code.

Recommendations For versions prior to 2.0.3, update to version 2.0.3 or later to resolve the issue. As a temporary workaround, consider restricting the use of the --last option and limiting the number of .fwknop.run arguments to minimize the risk of exploitation.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2012-4436

Affected Products

Fwknop

References · 13

• 🔥 http://cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git;a=commitdiff;h=a60f05ad44e824f6230b22f8976399340cb535dc · Exploit
• https://security-tracker.debian.org/tracker/CVE-2012-4436 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2012-4436 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2012-4436 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2012-4436 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2012-4436 · Security Note
• https://ubuntu.com/security/CVE-2012-4436 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2012-4436 · Vendor Advisory
• http://cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.html · Vendor Advisory
• http://openwall.com/lists/oss-security/2012/09/20/4 · Note
• http://cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=a60f05ad44e824f6230b22f8976399340cb535dc · Note
• http://seclists.org/oss-sec/2012/q3/509 · Note
• http://openwall.com/lists/oss-security/2012/09/19/2 · Note