FreeBSD 3.0/3.1/3.2 VFS Cache vfs_cache resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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3.6$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in FreeBSD 3.0/3.1/3.2. This affects an unknown part of the file vfs_cache of the component VFS Cache. Such manipulation leads to resource consumption. This vulnerability is uniquely identified as CVE-1999-0912. Moreover, an exploit is present. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in FreeBSD 3.0/3.1/3.2 (Operating System). Affected by this issue is an unknown code block of the file vfs_cache of the component VFS Cache. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

FreeBSD VFS cache (vfs_cache) allows local users to cause a denial of service by opening a large number of files.

The weakness was disclosed 09/22/1999 by Charles M. Hannum (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-1999-0912. The exploitation is known to be easy. The attack needs to be approached locally. 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 ANSI C and been published even before and not after the advisory. The exploit is available at downloads.securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 3.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (3441), Exploit-DB (19505), SecurityFocus (BID 653†) and OSVDB (1079†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.6

VulDB Base Score: 4.0
VulDB Temp Score: 3.6
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: Resource consumption
CWE: CWE-400 / CWE-404
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: FreeBSD 3.3

Timelineinfo

09/21/1999 🔍
09/22/1999 +1 days 🔍
09/22/1999 +0 days 🔍
09/22/1999 +0 days 🔍
02/21/2003 +1248 days 🔍
06/21/2014 +4137 days 🔍
07/19/2024 +3681 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: securityfocus.com⛔
Researcher: Charles M. Hannum
Status: Not defined

CVE: CVE-1999-0912 (🔍)
GCVE (CVE): GCVE-0-1999-0912
GCVE (VulDB): GCVE-100-14852
X-Force: 3441
SecurityFocus: 653 - FreeBSD vfs_cache Denial of Service Vulnerability
OSVDB: 1079 - FreeBSD vfs_cache Memory Consumption DoS

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

Entryinfo

Created: 06/22/2014 01:21
Updated: 07/19/2024 13:27
Changes: 06/22/2014 01:21 (52), 05/21/2018 10:12 (11), 07/19/2024 13:27 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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