OpenBSD 3.3/3.4 ibcs2_exec.c/exec_elf.c stack-based overflow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenBSD 3.3/3.4 and classified as problematic. Impacted is an unknown function of the file ibcs2_exec.c/exec_elf.c. Such manipulation leads to stack-based overflow. This vulnerability is listed as CVE-2003-0955. The attack must be carried out from within the local network. In addition, an exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in OpenBSD 3.3/3.4 (Operating System). It has been rated as problematic. Affected by this issue is an unknown code of the file ibcs2_exec.c/exec_elf.c. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is availability. CVE summarizes:

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.

The bug was discovered 11/17/2003. The weakness was presented 11/04/2003 by Georgi Guninski (Website). The advisory is shared for download at guninski.com. This vulnerability is handled as CVE-2003-0955 since 11/19/2003. The attack needs to be initiated within the local network. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

A public exploit has been developed in C. The exploit is available at guninski.com. It is declared as proof-of-concept.

Upgrading to version 3.3 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.openbsd.org. The best possible mitigation is suggested to be patching the affected component.

The vulnerability is also documented in the databases at X-Force (13614), Exploit-DB (118), SecurityFocus (BID 8978†), OSVDB (2775†) and Secunia (SA10147†). securityfocus.com is providing further details. See VDB-399 for similar entry. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.5
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenBSD 3.3
Patch: ftp.openbsd.org

Timelineinfo

11/04/2003 🔍
11/04/2003 +0 days 🔍
11/05/2003 +1 days 🔍
11/05/2003 +0 days 🔍
11/06/2003 +0 days 🔍
11/17/2003 +11 days 🔍
11/19/2003 +2 days 🔍
12/15/2003 +26 days 🔍
07/08/2024 +7511 days 🔍

Sourcesinfo

Advisory: guninski.com
Researcher: Georgi Guninski
Status: Not defined
Confirmation: 🔍

CVE: CVE-2003-0955 (🔍)
GCVE (CVE): GCVE-0-2003-0955
GCVE (VulDB): GCVE-100-368
X-Force: 13614 - OpenBSD ibcs2_exec.c and exec_elf.c denial of service, Medium Risk
SecurityFocus: 8978 - OpenBSD Local Malformed Binary Execution Denial of Service Vulnerability
Secunia: 10147 - OpenBSD Malformed Binary Execution Denial of Service Vulnerability, Not Critical
OSVDB: 2775 - OpenBSD Malformed Binary Execution DoS
SecuriTeam: securiteam.com

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 11/06/2003 09:57
Updated: 07/08/2024 04:16
Changes: 11/06/2003 09:57 (82), 06/27/2019 08:49 (2), 07/08/2024 04:16 (17)
Complete: 🔍
Cache ID: 216:D64:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!