Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2001-0131

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

Published: Mar 12, 2001 | Modified: Apr 03, 2025
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
RedHat/V3
2.9 LOW
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Ubuntu
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2001-0131
CWEhttps://cwe.mitre.org/data/definitions/59.html

htpasswd and htdigest in Apache 2.0a9, 1.3.14, and others allows local users to overwrite arbitrary files via a symlink attack.

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
Http_server Apache 1.3.14 (including) 1.3.14 (including)
Http_server Apache 2.0-alpha9 (including) 2.0-alpha9 (including)

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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