{"id":"CVE-2003-0955","aliases":["EUVD-2003-0945","GHSA-563f-qfcg-wp9f"],"status":"published","title":"OpenBSD kernel 3.3 and 3.4 allows local users to cause a denial of service (kernel panic) and...","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.","severity":{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01136,"percentile":0.66726,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2003-11-21T05:00:00Z","modified":"2026-06-16T22:03:14Z","exploits":[{"source":"exploitdb","id":"EDB-118","title":"OpenBSD - 'ibcs2_exec' Kernel Code Execution","type":"local","platform":"bsd","date":"2003-11-07","verified":true,"url":"https://www.exploit-db.com/exploits/118"},{"source":"exploitdb","id":"EDB-125","title":"OpenBSD 2.x \u003c 3.3 - 'exec_ibcs2_coff_prep_zmagic()' kernel stack overflow","type":"local","platform":"bsd","date":"2003-11-19","verified":true,"url":"https://www.exploit-db.com/exploits/125"}],"products":[{"vendor":"openbsd","product":"openbsd"}],"references":[{"url":"http://www.openbsd.org/errata33.html","tags":["vendor-advisory","x_refsource_OPENBSD","x_transferred"]},{"url":"http://marc.info/?l=openbsd-security-announce\u0026m=106917441524978\u0026w=2","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.securityfocus.com/bid/8978","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://marc.info/?l=openbsd-security-announce\u0026m=106808820119679\u0026w=2","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://lists.grok.org.uk/pipermail/full-disclosure/2003-November/013315.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred"]},{"url":"ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/005_exec.patch","tags":["vendor-advisory","x_refsource_OPENBSD","x_transferred","Patch"]},{"url":"http://www.guninski.com/msuxobsd2.html","tags":["x_refsource_MISC","x_transferred","Exploit","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2003-0955"},{"url":"https://github.com/advisories/GHSA-563f-qfcg-wp9f"}],"sources":{"cve":[{"id":"CVE-2003-0955","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.","status":"published","published":"2003-11-21T05:00:00Z","modified":"2024-08-08T02:12:35.415Z","updated_at":"2026-11-02T14:20:16.757505Z"}],"euvd":[{"id":"EUVD-2003-0945","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.","status":"published","published":"2003-11-21T05:00:00Z","modified":"2024-08-08T02:12:35Z","updated_at":"2026-11-03T01:15:05.487655Z"}],"ghsa":[{"id":"GHSA-563f-qfcg-wp9f","title":"OpenBSD kernel 3.3 and 3.4 allows local users to cause a denial of service (kernel panic) and...","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.","status":"published","published":"2022-05-03T03:09:49Z","modified":"2023-02-01T05:01:07Z","updated_at":"2026-11-02T14:49:40.106969Z"}],"nvd":[{"id":"CVE-2003-0955","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.","status":"published","published":"2003-12-15T05:00:00Z","modified":"2026-06-16T22:03:14.21Z","cvss":[{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:47.41445Z"}]}}