Authenticated code execution via unbounded sscanf parsing
Published Jul 29, 2024 · Updated Aug 2, 2024
Stack buffer overflow in Tenda AC10 v4 firmware 16.03.10.20 allows remote authenticated users to execute arbitrary code. The formSetVirtualSer handler accepts up to 512 bytes in the list parameter and passes it to Virtual_Data_Check, where unbounded sscanf fields write into smaller stack buffers. Low-privilege access to the web management endpoint is required; successful exploitation can take control of the router or crash its httpd service.
Summary
What happened
Stack buffer overflow in Tenda AC10 v4 firmware 16.03.10.20 allows remote authenticated users to execute arbitrary code. The formSetVirtualSer handler accepts up to 512 bytes in the list parameter and passes it to Virtual_Data_Check, where unbounded sscanf fields write into smaller stack buffers. Low-privilege access to the web management endpoint is required; successful exploitation can take control of the router or crash its httpd service.
The record
- CVE
- CVE-2024-33365
- Published
- Jul 29, 2024
- Updated
- Aug 2, 2024
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- Tenda AC10 Firmware
- Classifications
- CWE-120, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 29, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 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=16.03.10.20
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- SetVirtualServerCfg oversized list proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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