HIGH
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
Published Jun 25, 2002
7.2
HIGHCVSS 2.0
EPSS 0.60%
Description
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
7.2 HIGH NVD
AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.60% 0.00595
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.00595
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.60% (0.00595) | 46.47th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.60% (0.00595) | 43.58th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.15% (0.00151) | 33.09th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00043) | 5.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00043) | 5.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
Weaknesses (0)
No CWE recorded.
References (7)
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:42.signal.v1.1.asc vendor-advisoryx_refsource_FREEBSD
- http://archives.neohapsis.com/archives/bugtraq/2001-07/0179.html mailing-listx_refsource_BUGTRAQExploitPatchVendor Advisory
- http://ciac.llnl.gov/ciac/bulletins/l-111.shtml third-party-advisorygovernment-resourcex_refsource_CIAC
- http://www.kb.cert.org/vuls/id/943633 third-party-advisoryx_refsource_CERT-VNPatchThird Party AdvisoryUS Government Resource
- http://www.osvdb.org/1897 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/3007 vdb-entryx_refsource_BIDExploitPatchVendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6829 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:42.signal.v1.1.asc | vendor-advisoryx_refsource_FREEBSD | |
| http://archives.neohapsis.com/archives/bugtraq/2001-07/0179.html | mailing-listx_refsource_BUGTRAQExploitPatchVendor Advisory | |
| http://ciac.llnl.gov/ciac/bulletins/l-111.shtml | third-party-advisorygovernment-resourcex_refsource_CIAC | |
| http://www.kb.cert.org/vuls/id/943633 | third-party-advisoryx_refsource_CERT-VNPatchThird Party AdvisoryUS Government Resource | |
| http://www.osvdb.org/1897 | vdb-entryx_refsource_OSVDB | |
| http://www.securityfocus.com/bid/3007 | vdb-entryx_refsource_BIDExploitPatchVendor Advisory | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/6829 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jun 25, 2002
Updated Aug 8, 2024
Reserved Mar 15, 2002
Link CVE-2001-1180
CISA Vulnrichment
Updated n/a