Unauthenticated file disclosure via UPnP path traversal
Published Jan 7, 2021 · Updated Aug 3, 2024
Path traversal in the MERCUSYS Mercury X18G 1.0.5 UPnP server allows remote attackers to read device files through crafted URLs. The server resolves ../ path segments in request URIs without confining the result to its intended content directory, exposing files such as conf/template/uhttpd.json. No authentication or user interaction is required, and the documented consequence is read-only disclosure of files reachable by the server.
Summary
What happened
Path traversal in the MERCUSYS Mercury X18G 1.0.5 UPnP server allows remote attackers to read device files through crafted URLs. The server resolves ../ path segments in request URIs without confining the result to its intended content directory, exposing files such as conf/template/uhttpd.json. No authentication or user interaction is required, and the documented consequence is read-only disclosure of files reachable by the server.
The record
- CVE
- CVE-2021-23242
- Published
- Jan 7, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-22, T1005
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 7, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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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
- Mercury Router UPnP Server Directory Traversal demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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