Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2008-5147

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

Published: Nov 18, 2008 | Modified: Aug 08, 2017
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
6.9 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu
NEGLIGIBLE
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2008-5147
CWEhttps://cwe.mitre.org/data/definitions/59.html

test-pipe-to-pyodconverter.org.sh in docvert 2.4 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/outer.odt temporary file.

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
Docvert Holloway 2.4 (including) 2.4 (including)
Docvert Ubuntu intrepid *
Docvert Ubuntu jaunty *
Docvert Ubuntu karmic *
Docvert Ubuntu lucid *
Docvert Ubuntu maverick *
Docvert Ubuntu natty *
Docvert Ubuntu oneiric *
Docvert Ubuntu quantal *
Docvert Ubuntu raring *
Docvert Ubuntu upstream *

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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