OpenBSD 3.3/3.4 compat_ibcs2 stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenBSD 3.3/3.4. It has been rated as problematic. This vulnerability affects the function compat_ibcs2. Performing a manipulation results in stack-based overflow. This vulnerability is cataloged as CVE-2003-0955. The attack must originate from the local network. Furthermore, there is an exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in OpenBSD 3.3/3.4 (Operating System). This affects the function compat_ibcs2. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as 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). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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 shared 11/17/2003 by Georgi Guninski (Website). It is possible to read the advisory at guninski.com. This vulnerability is uniquely identified as CVE-2003-0955 since 11/19/2003. The attack needs to approached within the local network. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

The exploit is shared for download at guninski.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at openbsd.org.

The vulnerability is also documented in the databases at Exploit-DB (118), SecurityFocus (BID 9061†), OSVDB (2832†) and Secunia (SA10246†). Further details are available at openbsd.org. The entry VDB-368 is related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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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
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: openbsd.org

Timelineinfo

11/17/2003 🔍
11/17/2003 +0 days 🔍
11/17/2003 +0 days 🔍
11/18/2003 +1 days 🔍
11/18/2003 +0 days 🔍
11/19/2003 +0 days 🔍
11/19/2003 +0 days 🔍
12/15/2003 +26 days 🔍
07/09/2024 +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-100-399
SecurityFocus: 9061 - OpenBSD IBCS2 Binary Length Parameter Kernel-Based Buffer Overrun Vulnerability
Secunia: 10246 - OpenBSD compat_ibcs2 Buffer Overflow Vulnerability, Less Critical
OSVDB: 2832 - OpenBSD compat_ibcs2 Overflow

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

Entryinfo

Created: 11/19/2003 10:02
Updated: 07/09/2024 00:14
Changes: 11/19/2003 10:02 (76), 06/27/2019 09:46 (2), 07/09/2024 00:14 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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