FreeBSD 4.3 does not properly clear shared signal handlers when executing a process…
Priority LOW 33Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
FreeBSD 4.3 does not properly clear shared signal handlers when executing a process, which allows local users to gain privileges by calling rfork with a shared signal handler, having the child process execute a setuid program, and sending a signal to the child.
Why it matters now
EPSS 0.00595 48th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:freebsd:freebsd:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:4.1:*:*:*:*:*:*:* | 4.1 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:4.2:*:*:*:*:*:*:* | 4.2 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:4.3:*:*:*:*:*:*:* | 4.3 | Vulnerable | FreeBSD |
- cpe:2.3:o:freebsd:freebsd:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:4.1:*:*:*:*:*:*:* Versions 4.1 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:4.2:*:*:*:*:*:*:* Versions 4.2 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:4.3:*:*:*:*:*:*:* Versions 4.3 Vulnerable ·FreeBSD
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2001-1180
- 2026-10-03 Alias added: GHSA-84r2-3r7c-h628
References
Patch 1
Advisory 1
Other 1
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Sources
- CVE-2001-1180 · CVE Program
- CVE-2001-1180 · NVD
- FIRST EPSS
- GHSA-84r2-3r7c-h628 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences