Remote code execution via unchecked deviceId
Published Aug 7, 2023 · Updated Oct 15, 2024
Stack overflow in Tenda F1203/FH1203 2.0.1.6 and FH1205 2.0.0.7(775) allows remote attackers code execution or denial of service. The formSetDeviceName handler in the /bin/httpd binary copies the request's deviceId parameter into a stack buffer through sprintf without length checking, permitting the input to overwrite stack memory. The endpoint is reachable over the network; exploitation can crash the router or execute attacker-controlled code, while successful impact depends on the device accepting the crafted request.
Summary
What happened
Stack overflow in Tenda F1203/FH1203 2.0.1.6 and FH1205 2.0.0.7(775) allows remote attackers code execution or denial of service. The formSetDeviceName handler in the /bin/httpd binary copies the request's deviceId parameter into a stack buffer through sprintf without length checking, permitting the input to overwrite stack memory. The endpoint is reachable over the network; exploitation can crash the router or execute attacker-controlled code, while successful impact depends on the device accepting the crafted request.
The record
- CVE
- CVE-2023-38934
- Published
- Aug 7, 2023
- Updated
- Oct 15, 2024
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- FH1203
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 7, 2023CVE publishedPublication date reported by the CVE source.
- Oct 15, 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=V2.0.1.6
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.
Public exploit references
- FirmRec IoT-Vulns formSetDeviceName PoCproof of concept · unverified
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Technologies
Your stack
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Your stack
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