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Insecure Library Loading
Not critical

FUSE "fusermount" Race Condition Denial of Service

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Release Date:  2010-01-29    Last Update:  2011-03-01    Views:  3,423

Secunia Advisory SA38261

Where:

Local system

Impact:

Security Bypass, DoS

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


A security issue has been reported in FUSE (File System in Userspace), which can be exploited by malicious, local users to cause a DoS (Denial of Service).

The security issue is caused due to a race condition within the "fusermount" utility when performing unmount operations, which can be exploited to e.g. unmount arbitrary FUSE mounts via symlink attacks.

Note: Successful exploitation requires that the attacker is a member of the "fuse" group.

The security issue is reported in versions prior to 2.7.5 or 2.8.2.


Solution:
Update to version 2.7.5 or 2.8.2.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Dan Rosenberg

Original Advisory:
Red Hat Bug #577279:
https://bugzilla.redhat.com/show_bug.cgi?id=577279

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: FUSE "fusermount" Race Condition Denial of Service

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