FreeBSD 7.2/8.0/8.1-prerelease fhsize input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeBSD 7.2/8.0/8.1-prerelease. It has been classified as problematic. The impacted element is an unknown function. This manipulation of the argument fhsize causes input validation. This vulnerability is handled as CVE-2010-2020. Additionally, an exploit exists.

Detailsinfo

A vulnerability has been found in FreeBSD 7.2/8.0/8.1-prerelease (Operating System) and classified as critical. Affected by this vulnerability is an unknown code block. The manipulation of the argument fhsize with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

sys/nfsclient/nfs_vfsops.c in the NFS client in the kernel in FreeBSD 7.2 through 8.1-PRERELEASE, when vfs.usermount is enabled, does not validate the length of a certain fhsize parameter, which allows local users to gain privileges via a crafted mount request.

The weakness was released 05/28/2010 by Patroklos Argyroudis (Website). The advisory is shared at exploit-db.com. This vulnerability is known as CVE-2010-2020. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

A public exploit has been developed by Patroklos Argyroudis and been published 4 weeks after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 118076 (FreeBSD Kernel NFS Client Local Vulnerabilities).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (14003), SecurityTracker (ID 1024039†) and Vulnerability Center (SBV-32703†). Entry connected to this vulnerability is available at VDB-53402. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.4
VulDB Temp Score: 7.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Patroklos Argyroudis
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 67507
OpenVAS Name: FreeBSD Security Advisory (FreeBSD-SA-10:06.nfsclient.asc)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

05/24/2010 🔍
05/28/2010 +4 days 🔍
05/28/2010 +0 days 🔍
05/28/2010 +0 days 🔍
06/23/2010 +26 days 🔍
06/23/2010 +0 days 🔍
08/15/2011 +418 days 🔍
03/19/2015 +1312 days 🔍
01/25/2025 +3600 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: exploit-db.com
Researcher: Patroklos Argyroudis
Status: Confirmed

CVE: CVE-2010-2020 (🔍)
GCVE (CVE): GCVE-0-2010-2020
GCVE (VulDB): GCVE-100-53401
SecurityTracker: 1024039
Vulnerability Center: 32703 - FreeBSD 7.2 - 8.1-PRERELEASE Local Privileges Escalation, High

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

Entryinfo

Created: 03/19/2015 12:22
Updated: 01/25/2025 19:16
Changes: 03/19/2015 12:22 (51), 03/29/2017 18:19 (14), 09/14/2021 12:47 (3), 07/30/2024 08:03 (16), 01/25/2025 19:16 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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