OpenBSD up to 2.7 fstat PWD format string

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenBSD 2.3/2.4/2.5/2.6/2.7. It has been rated as problematic. This affects an unknown part of the file fstat. The manipulation of the argument PWD as part of Environment Variable leads to format string. This vulnerability is referenced as CVE-2000-0994. Furthermore, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in OpenBSD 2.3/2.4/2.5/2.6/2.7 (Operating System) and classified as critical. This issue affects an unknown function of the file fstat. The manipulation of the argument PWD as part of a Environment Variable leads to a format string vulnerability. Using CWE to declare the problem leads to CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Format string vulnerability in OpenBSD fstat program (and possibly other BSD-based operating systems) allows local users to gain root privileges via the PWD environmental variable.

The weakness was published 12/19/2000 by FIRST (Website). The advisory is shared at marc.theaimsgroup.com. The identification of this vulnerability is CVE-2000-0994. The exploitation is known to be easy. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

A public exploit has been developed in ANSI C. The exploit is available at securityfocus.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k.

Upgrading to version 2.8 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (5338), Exploit-DB (20256) and SecurityFocus (BID 1746†). Similar entry is available at VDB-16025. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.4
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Format string
CWE: CWE-134 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

0-Day Time: 🔍

Upgrade: OpenBSD 2.8

Timelineinfo

10/04/2000 🔍
12/19/2000 +76 days 🔍
12/19/2000 +0 days 🔍
07/02/2014 +4943 days 🔍
01/06/2025 +3840 days 🔍

Sourcesinfo

Advisory: marc.theaimsgroup.com
Researcher: FIRST
Status: Confirmed

CVE: CVE-2000-0994 (🔍)
GCVE (CVE): GCVE-0-2000-0994
GCVE (VulDB): GCVE-100-16205
X-Force: 5338 - BSD systems fstat format string
SecurityFocus: 1746 - Multiple Vendor BSD fstat Format String Vulnerability

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

Entryinfo

Created: 07/02/2014 11:24
Updated: 01/06/2025 00:45
Changes: 07/02/2014 11:24 (54), 05/28/2018 09:19 (8), 01/06/2025 00:45 (19)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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