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CVE-2003-0955

MediumPublished

OpenBSD kernel 3.3 and 3.4 allows local users to cause a denial of service (kernel panic) and possibly execute arbitrary code in 3.4 via a program with an...

Published: Nov 21, 2003
Updated: Aug 8, 2024
Assigning CNA: mitre
Evidence observed: Nov 7, 2003

Primary CVSS

4.6/ 10Medium

nvd · CVSS 2.0

AV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS probability estimate

1.1%

Low · next 30 days

Percentile: 64.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

OpenBSD kernel 3.3 and 3.4 allows local users to cause a denial of service (kernel panic) and possibly execute arbitrary code in 3.4 via a program with an invalid header that is not properly handled by (1) ibcs2_exec.c in the iBCS2 emulation (compat_ibcs2) or (2) exec_elf.c, which leads to a stack-based buffer overflow.

Sources

OpenBSD - 'ibcs2_exec' Kernel Code ExecutionExploit
Scott Bartram · bsd · Nov 7, 2003
OpenBSD 2.x < 3.3 - 'exec_ibcs2_coff_prep_zmagic()' kernel stack overflowExploit
Sinan Eren · bsd · Nov 19, 2003

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