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.

Published: 2012-10-22 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-4436 is rated Low Risk (25.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.07%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2012-4436

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-26 0.18% 0.07% -0.10%
2 2025-03-17 0.04% 0.18% +0.14%
3 2023-03-07 — 0.04% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-4436

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.4 2.0 MEDIUM
AV:L/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.4 6.4 [email protected]

Weakness enumeration for CVE-2012-4436

OS Trackers for CVE-2012-4436

vendor priority summary link
debian not yet assigned CVE-2012-4436 not yet assigned priority: Debian including 1 source packages (fwknop), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2012-4436
ubuntu medium CVE-2012-4436 medium priority: Ubuntu including 1 source packages (fwknop), 19 status rows across 19 suites (artful, bionic, cosmic, hardy, lucid, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 13, not-affected 3, DNE 2, released 1. https://ubuntu.com/security/CVE-2012-4436

Affected software / configurations for CVE-2012-4436

Vendor Product Version Raw CPE
cipherdyne fwknop <= 2.0.2 cpe:2.3:a:cipherdyne:fwknop:*:*:*:*:*:*:*:*
cipherdyne fwknop 2.0 cpe:2.3:a:cipherdyne:fwknop:2.0:*:*:*:*:*:*:*
cipherdyne fwknop 2.0.1 cpe:2.3:a:cipherdyne:fwknop:2.0.1:*:*:*:*:*:*:*

References for CVE-2012-4436

cvelogic Threat Intelligence