Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2012-2103

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

Published: Aug 26, 2012 | Modified: Apr 11, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
1.2 LOW
AV:L/AC:H/Au:N/C:N/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu
NEGLIGIBLE
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2012-2103
CWEhttps://cwe.mitre.org/data/definitions/59.html

The qmailscan plugin for Munin 1.4.5 allows local users to overwrite arbitrary files via a symlink attack on temporary files with predictable names.

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

NameVendorStart VersionEnd Version
MuninMunin-monitoring1.4.5 (including)1.4.5 (including)
MuninUbuntuhardy*
MuninUbuntulucid*
MuninUbuntunatty*
MuninUbuntuoneiric*
MuninUbuntuprecise*

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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