CVE-2004-1031

fcronsighup in Fcron 2.0.1, 2.9.4, and possibly earlier versions allows local users to bypass access restrictions and load an arbitrary configuration file by starting an suid process and pointing the fcronsighup configuration file to a /proc entry that is owned by root but modifiable by the user, such as /proc/self/cmdline or /proc/self/environ.

Published: 2005-03-01 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2004-1031 is rated Low Risk (39.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.37%). 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-2004-1031

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 2026-06-15 0.05% 0.37% +0.32%
2 2025-03-30 0.05% 0.05% -0.00%
3 2025-03-29 — 0.05% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2004-1031

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2004-1031

OS Trackers for CVE-2004-1031

vendor priority summary link
ubuntu medium CVE-2004-1031 medium priority: Ubuntu including 1 source packages (fcron), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2004-1031

Affected software / configurations for CVE-2004-1031

Vendor Product Version Raw CPE
thibault_godouet fcron 2.0.1 cpe:2.3:a:thibault_godouet:fcron:2.0.1:*:*:*:*:*:*:*
thibault_godouet fcron 2.9.4 cpe:2.3:a:thibault_godouet:fcron:2.9.4:*:*:*:*:*:*:*
gentoo linux — cpe:2.3:o:gentoo:linux:*:*:*:*:*:*:*:*

References for CVE-2004-1031

cvelogic Threat Intelligence