CVE-2003-0955
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…
- 4.6MediumCVSS base score
- 1.1%Exploitation in 30 daysEPSS · top 33% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 2Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list 2 Exploit-DB entries for it.
Show the exploits2
Exploit-DB2 entries
- OpenBSD 2.x < 3.3 - 'exec_ibcs2_coff_prep_zmagic()' kernel stack overflow (Exploit-DB entry) (opens in a new tab)
EDB-ID 125local, bsdpublished 19 Nov 2003Verified
- OpenBSD - 'ibcs2_exec' Kernel Code Execution (Exploit-DB entry) (opens in a new tab)
EDB-ID 118local, bsdpublished 7 Nov 2003Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 2 days later
· 2 days later
Published
- 21 years later
· 21 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 1.1% · top 33% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.6.
Affected products
n/a
- affected n/a
References
6
- 20031104 010: RELIABILITY FIX: November 4, 2003 (opens in a new tab)vendor-advisoryx_refsource_OPENBSDx_transferred
- http://marc.info/?l=openbsd-security-announce&m=106917441524978&w=2 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 8978 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://marc.info/?l=openbsd-security-announce&m=106808820119679&w=2 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20031104 OpenBSD kernel overflow, yet still *BSD much better than windows (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- http://www.guninski.com/msuxobsd2.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2003-0945 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2003-0955)Record last updated .