CVE-2012-4436

CVE-2012-4436 is a medium-severity vulnerability in Cipherdyne Fwknop with a CVSS 2.0 base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

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.

Frequently asked questions

What is CVE-2012-4436?
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.
How severe is CVE-2012-4436?
CVE-2012-4436 has a CVSS 2.0 base score of 4.4, rated medium severity.
Is CVE-2012-4436 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4436?
CVE-2012-4436 primarily affects Cipherdyne Fwknop. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-4436?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-4436 published?
CVE-2012-4436 was published on 2012-10-22 and last updated on 2026-06-16.

References

Affected products (3)

More vulnerabilities in Cipherdyne Fwknop

All CVEs affecting Cipherdyne Fwknop →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →