Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2010-0789

Improper Link Resolution Before File Access ('Link Following')

Published: Mar 02, 2010 | Modified: Aug 17, 2017
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
3.3 LOW
AV:L/AC:M/Au:N/C:N/I:P/A:P
RedHat/V2
1.7 LOW
AV:L/AC:L/Au:S/C:N/I:N/A:P
RedHat/V3
Ubuntu
MEDIUM
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2010-0789
CWEhttps://cwe.mitre.org/data/definitions/59.html

fusermount in FUSE before 2.7.5, and 2.8.x before 2.8.2, allows local users to unmount an arbitrary FUSE filesystem share via a symlink attack on a mountpoint.

Weakness

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.

Affected Software

Name Vendor Start Version End Version
Fuse Fuse 1.9 (including) 1.9 (including)
Fuse Fuse 2.0-pre0 (including) 2.0-pre0 (including)
Fuse Fuse 2.0-pre1 (including) 2.0-pre1 (including)
Fuse Fuse 2.1 (including) 2.1 (including)
Fuse Fuse 2.2 (including) 2.2 (including)
Fuse Fuse 2.2.1 (including) 2.2.1 (including)
Fuse Fuse 2.3-pre (including) 2.3-pre (including)
Fuse Fuse 2.3-rc1 (including) 2.3-rc1 (including)
Fuse Fuse 2.3.0 (including) 2.3.0 (including)
Fuse Fuse 2.4.0 (including) 2.4.0 (including)
Fuse Fuse 2.4.1 (including) 2.4.1 (including)
Fuse Fuse 2.4.2 (including) 2.4.2 (including)
Fuse Fuse 2.5.0 (including) 2.5.0 (including)
Fuse Fuse 2.5.1 (including) 2.5.1 (including)
Fuse Fuse 2.5.2 (including) 2.5.2 (including)
Fuse Fuse 2.5.3 (including) 2.5.3 (including)
Fuse Fuse 2.6.0 (including) 2.6.0 (including)
Fuse Fuse 2.6.1 (including) 2.6.1 (including)
Fuse Fuse 2.6.3 (including) 2.6.3 (including)
Fuse Fuse 2.6.5 (including) 2.6.5 (including)
Fuse Fuse 2.7.0 (including) 2.7.0 (including)
Fuse Fuse 2.7.1 (including) 2.7.1 (including)
Fuse Fuse 2.7.2 (including) 2.7.2 (including)
Fuse Fuse 2.7.3 (including) 2.7.3 (including)
Fuse Fuse 2.7.4 (including) 2.7.4 (including)
Fuse Ubuntu dapper *
Fuse Ubuntu devel *
Fuse Ubuntu hardy *
Fuse Ubuntu intrepid *
Fuse Ubuntu jaunty *
Fuse Ubuntu karmic *

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References

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