Remote code execution via unbounded QoS list copy
Published Aug 7, 2023 · Updated Oct 15, 2024
Stack-based buffer overflow in Tenda AC1206, AC8, AC5, AC10, and AC9 firmware allows remote attackers to execute code or crash the router. The formSetQosBand handler passes the list request parameter through setQosMiblist, where strcpy copies it into the fixed-size qos_str stack buffer without a length check. No authentication or user interaction is required, and successful exploitation can interrupt routing service or execute code on the appliance.
Summary
What happened
Stack-based buffer overflow in Tenda AC1206, AC8, AC5, AC10, and AC9 firmware allows remote attackers to execute code or crash the router. The formSetQosBand handler passes the list request parameter through setQosMiblist, where strcpy copies it into the fixed-size qos_str stack buffer without a length check. No authentication or user interaction is required, and successful exploitation can interrupt routing service or execute code on the appliance.
The record
- CVE
- CVE-2023-38935
- Published
- Aug 7, 2023
- Updated
- Oct 15, 2024
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- AC8
- 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=V4 V16.03.34.06
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 formSetQosBand proof of conceptproof of concept · unverified
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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