CVE-2003-0955 EXPLOIT
4.6
MEDIUM · CVSS 2.0 · EPSS 1.1% (pctl 66)
Patch early
A public exploit exists.
Description
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.
Scoring
| CVSS | 4.6 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:L/AC:L/Au:N/C:P/I:P/A:P |
| EPSS | 1.14% — more likely to be exploited than 66% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2003-12-15 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| openbsd | openbsd |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | OpenBSD 2.x < 3.3 - 'exec_ibcs2_coff_prep_zmagic()' kernel stack overflow | 2003-11-19 |
| exploit-db | OpenBSD - 'ibcs2_exec' Kernel Code Execution | 2003-11-07 |
References
- ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/005_exec.patch
- http://lists.grok.org.uk/pipermail/full-disclosure/2003-November/013315.html
- http://marc.info/?l=openbsd-security-announce&m=106808820119679&w=2
- http://marc.info/?l=openbsd-security-announce&m=106917441524978&w=2
- http://www.guninski.com/msuxobsd2.html
- http://www.openbsd.org/errata33.html
- http://www.securityfocus.com/bid/8978
- ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/005_exec.patch
- http://lists.grok.org.uk/pipermail/full-disclosure/2003-November/013315.html
- http://marc.info/?l=openbsd-security-announce&m=106808820119679&w=2
- http://marc.info/?l=openbsd-security-announce&m=106917441524978&w=2
- http://www.guninski.com/msuxobsd2.html
- http://www.openbsd.org/errata33.html
- http://www.securityfocus.com/bid/8978
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