Authenticated file disclosure via weak filename validation
Published Nov 5, 2021 · Updated Aug 4, 2024
Path traversal in FusionPBX before 4.5.30 allows remote authenticated users to download arbitrary server files through the Log View page. The download handler joins the untrusted n parameter to the configured log directory and passes the result to fopen after only a filename-prefix check. Any user granted log-download permission can read files accessible to the web process; the documented impact is disclosure, not modification or service interruption.
Summary
What happened
Path traversal in FusionPBX before 4.5.30 allows remote authenticated users to download arbitrary server files through the Log View page. The download handler joins the untrusted n parameter to the configured log directory and passes the result to fopen after only a filename-prefix check. Any user granted log-download permission can read files accessible to the web process; the documented impact is disclosure, not modification or service interruption.
The record
- CVE
- CVE-2021-43403
- Published
- Nov 5, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 5, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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