Arbitrary file copy via unvalidated backup path
Published Apr 28, 2020 · Updated Aug 4, 2024
Path traversal in Tiny File Manager 2.4.1 allows remote authenticated users to copy files outside the configured application scope. The AJAX backup handler passes the POST path and file values directly to copy(), so an absolute path selects a source beyond FM_ROOT_PATH. A non-readonly account, or disabled authentication, is required; the resulting .bak file sits beside the source and can disclose server-side PHP code when web-accessible.
Summary
What happened
Path traversal in Tiny File Manager 2.4.1 allows remote authenticated users to copy files outside the configured application scope. The AJAX backup handler passes the POST path and file values directly to copy(), so an absolute path selects a source beyond FM_ROOT_PATH. A non-readonly account, or disabled authentication, is required; the resulting .bak file sits beside the source and can disclose server-side PHP code when web-accessible.
The record
- CVE
- CVE-2020-12103
- Published
- Apr 28, 2020
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-22, T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 28, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Authenticated absolute-path backup HTTP requestproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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