fuse up to 2.8.5 link following

Summaryinfo

A vulnerability has been found in fuse and classified as problematic. This issue affects some unknown processing. Performing a manipulation results in link following. This vulnerability is known as CVE-2011-0541. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in fuse. It has been classified as problematic. This affects an unknown part. The manipulation with an unknown input leads to a link following vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity, and availability. The summary by CVE is:

fuse 2.8.5 and earlier does not properly handle when /etc/mtab cannot be updated, which allows local users to unmount arbitrary directories via a symlink attack.

The weakness was published 09/02/2011 (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2011-0541 since 01/20/2011. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

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 and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 155719 (Oracle Enterprise Linux Update for FUSE (ELSA-2011-1083)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (68309) and SecurityFocus (BID 44623†). Similar entries are available at VDB-56204, VDB-58427 and VDB-58426. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• fuse

Version

• 1.9
• 2.0
• 2.1
• 2.2
• 2.2.1
• 2.3.0
• 2.4.0
• 2.4.1
• 2.4.2
• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.6.0
• 2.6.1
• 2.6.3
• 2.6.5
• 2.7.0
• 2.7.1
• 2.7.2
• 2.7.3
• 2.7.4
• 2.7.5
• 2.7.6
• 2.8.0
• 2.8.1
• 2.8.2
• 2.8.3
• 2.8.4
• 2.8.5

CPE 2.3info

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CPE 2.2info

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Threat Intelligenceinfo

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Entryinfo

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

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