CVE-2003-0955

OpenBSD - 'ibcs2_exec' Kernel Code Execution

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

El Kernel OpenBSD 3.3 y 3.4 permite que usuarios locales causen una denegación de servicio (kernel panic) y posiblemente ejecuten código arbitrario en 3.4 mediante un programa con una cabecera inválida. Esto no lo maneja adecuadamente en (1) bcs2_exec.c o (2) exec_elf.c, que lleva a un desbordamiento de búfer.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2003-11-07 First Exploit
2003-11-19 CVE Reserved
2003-11-21 CVE Published
2024-08-08 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CAPEC

References (9)

URL	Tag	Source
http://lists.grok.org.uk/pipermail/full-disclosure/2003-November/013315.html	Mailing List
http://marc.info/?l=openbsd-security-announce&m=106808820119679&w=2	X_refsource_confirm
http://marc.info/?l=openbsd-security-announce&m=106917441524978&w=2	X_refsource_confirm
http://www.securityfocus.com/bid/8978	Vdb Entry

URL	Date	SRC
https://www.exploit-db.com/exploits/118	2003-11-07
https://www.exploit-db.com/exploits/125	2003-11-19
http://www.guninski.com/msuxobsd2.html	2024-08-08

URL	Date	SRC
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.4/common/005_exec.patch	2016-10-18

URL	Date	SRC
http://www.openbsd.org/errata33.html	2016-10-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				3.3 Search vendor "Openbsd" for product "Openbsd" and version "3.3"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				3.4 Search vendor "Openbsd" for product "Openbsd" and version "3.4"		-		Affected