CVE-2001-1559 EXPLOIT
5.5
MEDIUM · CVSS 3.1 · EPSS 1.5% (pctl 73)
Patch early
A public exploit exists.
Description
The uipc system calls (uipc_syscalls.c) in OpenBSD 2.9 and 3.0 provide user mode return instead of versus rval kernel mode values to the fdrelease function, which allows local users to cause a denial of service and trigger a null dereference.
Scoring
| CVSS | 5.5 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| EPSS | 1.48% — more likely to be exploited than 73% of all CVEs |
| Weakness | CWE-476 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2001-12-31 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| openbsd | openbsd |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | OpenBSD 2.x/3.0 - User Mode Return Value Denial of Service | 2001-12-03 |
References
- http://archives.neohapsis.com/archives/bugtraq/2001-12/0014.html
- http://monkey.org/openbsd/archive/tech/0112/msg00015.html
- http://www.iss.net/security_center/static/7690.php
- http://archives.neohapsis.com/archives/bugtraq/2001-12/0014.html
- http://monkey.org/openbsd/archive/tech/0112/msg00015.html
- http://www.iss.net/security_center/static/7690.php
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