FUSE up to 2.8.5 Filesystem link following

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

A vulnerability was found in FUSE up to 2.8.5. It has been rated as critical. Affected by this issue is an unknown functionality of the component Filesystem. The manipulation with an unknown input leads to a link following vulnerability. Using CWE to declare the problem leads to CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. Impacted is integrity, and availability. CVE summarizes:

FUSE, possibly 2.8.5 and earlier, allows local users to create mtab entries with arbitrary pathnames, and consequently unmount any filesystem, via a symlink attack on the parent directory of the mountpoint of a FUSE filesystem, a different vulnerability than CVE-2010-0789.

The weakness was shared 01/19/2011 by halfdog as Bug 651183 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2010-3879. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 68309 (Oracle Linux 6 : fuse (ELSA-2011-1083)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165187 (SUSE Security Update for Multiple Packages (SUSE-SR:2011:005)).

A possible mitigation has been published 7 hours after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (62986) and Tenable (68309).

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

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

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68309
Nessus Name: Oracle Linux 6 : fuse (ELSA-2011-1083)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 862841
OpenVAS Name: Fedora Update for util-linux-ng FEDORA-2011-0854
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

10/08/2010 🔍
11/02/2010 +25 days 🔍
11/02/2010 +0 days 🔍
01/19/2011 +78 days 🔍
01/20/2011 +0 days 🔍
01/20/2011 +0 days 🔍
01/22/2011 +1 days 🔍
01/24/2011 +2 days 🔍
07/12/2013 +900 days 🔍
03/19/2015 +615 days 🔍
10/13/2021 +2400 days 🔍

Sourcesinfo

Advisory: Bug 651183
Researcher: halfdog
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-3879 (🔍)
OVAL: 🔍

X-Force: 62986
Vulnerability Center: 29345 - FUSE 2.8.5 and Prior Local DoS Vulnerability via a Symlink Attack, Low
SecurityFocus: 44623 - FUSE fusermount Tool Race Condition Vulnerability
Secunia: 42961
OSVDB: 70520 - FUSE fusermount Arbitrary Unmount Local DoS

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

Entryinfo

Created: 03/19/2015 23:27
Updated: 10/13/2021 03:41
Changes: 03/19/2015 23:27 (66), 03/14/2017 11:45 (13), 10/13/2021 03:32 (5), 10/13/2021 03:41 (1)
Complete: 🔍
Cache ID: 18:38C:103

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