CVE-2012-5642

server/action.py in Fail2ban before 0.8.8 does not properly handle the content of the matches tag, which might allow remote attackers to trigger unsafe behavior in a custom action file via unspecified symbols in this content.

Published: 2012-12-31 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-5642 is rated Moderate Risk (56.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.64%). Review affected assets and schedule remediation.

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-2012-5642

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 2025-03-30 2.83% 1.64% -1.18%
2 2025-03-29 1.64% 2.83% +1.18%
3 2025-03-17 — 1.64% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-5642

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
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.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2012-5642

OS Trackers for CVE-2012-5642

vendor priority summary link
debian low CVE-2012-5642 low priority: Debian including 1 source packages (fail2ban), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2012-5642
ubuntu medium CVE-2012-5642 medium priority: Ubuntu including 1 source packages (fail2ban), 9 status rows across 9 suites (hardy, lucid, oneiric, precise, quantal, raring, saucy, trusty, upstream): ignored 5, not-affected 2, released 2. https://ubuntu.com/security/CVE-2012-5642

Affected software / configurations for CVE-2012-5642

Vendor Product Version Raw CPE
fail2ban fail2ban <= 0.8.7.1 cpe:2.3:a:fail2ban:fail2ban:*:*:*:*:*:*:*:*
fail2ban fail2ban 0.1.0 cpe:2.3:a:fail2ban:fail2ban:0.1.0:*:*:*:*:*:*:*
fail2ban fail2ban 0.1.1 cpe:2.3:a:fail2ban:fail2ban:0.1.1:*:*:*:*:*:*:*
fail2ban fail2ban 0.1.2 cpe:2.3:a:fail2ban:fail2ban:0.1.2:*:*:*:*:*:*:*
fail2ban fail2ban 0.3.0 cpe:2.3:a:fail2ban:fail2ban:0.3.0:*:*:*:*:*:*:*
fail2ban fail2ban 0.3.1 cpe:2.3:a:fail2ban:fail2ban:0.3.1:*:*:*:*:*:*:*
fail2ban fail2ban 0.4.0 cpe:2.3:a:fail2ban:fail2ban:0.4.0:*:*:*:*:*:*:*
fail2ban fail2ban 0.4.1 cpe:2.3:a:fail2ban:fail2ban:0.4.1:*:*:*:*:*:*:*
fail2ban fail2ban 0.5.0 cpe:2.3:a:fail2ban:fail2ban:0.5.0:*:*:*:*:*:*:*
fail2ban fail2ban 0.5.1 cpe:2.3:a:fail2ban:fail2ban:0.5.1:*:*:*:*:*:*:*
fail2ban fail2ban 0.5.2 cpe:2.3:a:fail2ban:fail2ban:0.5.2:*:*:*:*:*:*:*
fail2ban fail2ban 0.5.3 cpe:2.3:a:fail2ban:fail2ban:0.5.3:*:*:*:*:*:*:*
fail2ban fail2ban 0.5.4 cpe:2.3:a:fail2ban:fail2ban:0.5.4:*:*:*:*:*:*:*
fail2ban fail2ban 0.5.5 cpe:2.3:a:fail2ban:fail2ban:0.5.5:*:*:*:*:*:*:*
fail2ban fail2ban 0.6.0 cpe:2.3:a:fail2ban:fail2ban:0.6.0:*:*:*:*:*:*:*
fail2ban fail2ban 0.6.1 cpe:2.3:a:fail2ban:fail2ban:0.6.1:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.0 cpe:2.3:a:fail2ban:fail2ban:0.7.0:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.1 cpe:2.3:a:fail2ban:fail2ban:0.7.1:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.2 cpe:2.3:a:fail2ban:fail2ban:0.7.2:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.3 cpe:2.3:a:fail2ban:fail2ban:0.7.3:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.4 cpe:2.3:a:fail2ban:fail2ban:0.7.4:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.5 cpe:2.3:a:fail2ban:fail2ban:0.7.5:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.6 cpe:2.3:a:fail2ban:fail2ban:0.7.6:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.7 cpe:2.3:a:fail2ban:fail2ban:0.7.7:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.8 cpe:2.3:a:fail2ban:fail2ban:0.7.8:*:*:*:*:*:*:*
fail2ban fail2ban 0.7.9 cpe:2.3:a:fail2ban:fail2ban:0.7.9:*:*:*:*:*:*:*
fail2ban fail2ban 0.8.0 cpe:2.3:a:fail2ban:fail2ban:0.8.0:*:*:*:*:*:*:*
fail2ban fail2ban 0.8.1 cpe:2.3:a:fail2ban:fail2ban:0.8.1:*:*:*:*:*:*:*
fail2ban fail2ban 0.8.2 cpe:2.3:a:fail2ban:fail2ban:0.8.2:*:*:*:*:*:*:*
fail2ban fail2ban 0.8.3 cpe:2.3:a:fail2ban:fail2ban:0.8.3:*:*:*:*:*:*:*
fail2ban fail2ban 0.8.4 cpe:2.3:a:fail2ban:fail2ban:0.8.4:*:*:*:*:*:*:*
fail2ban fail2ban 0.8.5 cpe:2.3:a:fail2ban:fail2ban:0.8.5:*:*:*:*:*:*:*
fail2ban fail2ban 0.8.6 cpe:2.3:a:fail2ban:fail2ban:0.8.6:*:*:*:*:*:*:*
fail2ban fail2ban 0.8.7 cpe:2.3:a:fail2ban:fail2ban:0.8.7:*:*:*:*:*:*:*

References for CVE-2012-5642

cvelogic Threat Intelligence