CVE-2003-0955 json
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…
published 2003-11-21 22 y ago modified 2026-06-16 4 mo ago also EUVD-2003-0945
- cvss
- 4.6
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 66%
- public exploits
- 2
- Exploit-DB
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.
Timeline
- First public exploit (EDB-118)
- Published
Exploit prediction
1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-125 OpenBSD 2.x < 3.3 - 'exec_ibcs2_coff_prep_zmagic()' kernel stack overflow local, 2003-11-19
- EDB-118 OpenBSD - 'ibcs2_exec' Kernel Code Execution local, 2003-11-07
- guninski.com http://www.guninski.com/msuxobsd2.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
References
-
guninski.com
/msuxobsd2.html
exploit, vendor-advisory
-
openbsd.org
/errata33.html
vendor-advisory
- marc.info /?l=openbsd-security-announce&m=106917441524978&w=2
-
securityfocus.com
/bid/8978
vdb-entry
- marc.info /?l=openbsd-security-announce&m=106808820119679&w=2
-
lists.grok.org.uk
/pipermail/full-disclosure/2003-November/013315.html
mailing-list
Sources
- CVE List CVE-2003-0955
- NVD CVE-2003-0955
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