Unauthenticated arbitrary file read via unsanitized tmp route
Published Oct 12, 2021 · Updated Sep 16, 2024
Path traversal in Moxa MXview 3.x through 3.2.2 allows remote attackers to read arbitrary Windows files through its web interface. The unauthenticated /tmp route in ResourceRoutes accepts a user-controlled filename without the sanitize-filename check used by other routes, so encoded traversal sequences escape the intended directory. No account is required, and exposed files include clear-text configuration secrets; Moxa and CISA separately characterize the flaw as allowing critical files to be created or overwritten.
Summary
What happened
Path traversal in Moxa MXview 3.x through 3.2.2 allows remote attackers to read arbitrary Windows files through its web interface. The unauthenticated /tmp route in ResourceRoutes accepts a user-controlled filename without the sanitize-filename check used by other routes, so encoded traversal sequences escape the intended directory. No account is required, and exposed files include clear-text configuration secrets; Moxa and CISA separately characterize the flaw as allowing critical files to be created or overwritten.
The record
- CVE
- CVE-2021-38452
- Published
- Oct 12, 2021
- Updated
- Sep 16, 2024
- Vendor
- Moxa
- Product
- MXview
- Classifications
- CWE-22, T1005
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 12, 2021CVE publishedPublication date reported by the CVE source.
- Sep 16, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=3.x <=3.2.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
- Team82 CVE-2021-38452 file-read proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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