The convert-fcrontab program in fcron 3.0.0 might allow local users to gain privileges via a long command-line argument, which causes Linux
The convert-fcrontab program in fcron 3.0.0 might allow local users to gain privileges via a long command-line argument, which causes Linux glibc to report heap memory corruption, possibly because a strcpy in the strdup2 function can "overwrite some data."
- Published
- Feb 3, 2006
- Updated
- Jun 16, 2026
- EPSS
- 0.8% · 54th percentile
- CWE
- —
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Report tools
Action score
18
Monitor
Low priority for now.
- CVSS
- 18 / 40 · 4.6 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.8%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| thibault godouet | fcron | cpe:2.3:a:thibault_godouet:fcron |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- thibault godouet fcron3.0.0
Same product
thibault godouet: all recordsOther highest-scoring records for the same primary product.
- CVE-2004-1031fcronsighup in Fcron 2.0.1, 2.9.4, and possibly earlier versions allows local users to bypass access restrictions and load an arbitrary conf28Monitor
- CVE-2006-0575convert-fcrontab in Fcron 2.9.5 and 3.0.0 allows remote attackers to create or overwrite arbitrary files via ".." sequences and a symlink at20Monitor
- CVE-2001-0685Thibault Godouet FCron prior to 1.1.1 allows a local user to corrupt another user's crontab file via a symlink attack on the fcrontab tempor10Monitor
- CVE-2004-1033Fcron 2.0.1, 2.9.4, and possibly earlier versions leak file descriptors of open files, which allows local users to bypass access restriction8Monitor
- CVE-2004-1030fcronsighup in Fcron 2.0.1, 2.9.4, and possibly earlier versions allows local users to gain sensitive information by calling fcronsighup wit8Monitor
- CVE-2004-1032fcronsighup in Fcron 2.0.1, 2.9.4, and possibly earlier versions allows local users to delete arbitrary files or create arbitrary empty file8Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | dos | 2006-02-01 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoC-3 d
- Published
- TodayOct 8, 2026+7552 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- P · data can be read
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- P
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
—
CVSS vector
AV:L/AC:L/Au:N/C:P/I:P/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- archives.neohapsis.com/archives/fulldisclosure/2006-01/0999.html
- fcron.free.fr/doc/en/changes.html
- fcron.free.fr/news.php#a20060206a.xml
- secunia.com/advisories/18719
- www.securityfocus.com/archive/1/423697/100/0/threaded
- www.securityfocus.com/bid/16467
- www.trustix.org/errata/2006/0036
- www.vupen.com/english/advisories/2006/0435
- bugs.trustix.org/show_bug.cgi?id=1754
- exchange.xforce.ibmcloud.com/vulnerabilities/24444
Vendor advisories and official records. Exploit/PoC links are deliberately left out.