Code execution via unchecked sprintf stack write
Published Jul 10, 2023 · Updated Nov 12, 2024
Stack-based buffer overflow in Tenda FH1203 2.0.1.6 allows remote attackers to execute code or crash the router via a crafted entrys value. The fromAddressNat handler passes the user-controlled entrys and mitInterface strings to sprintf without a length check, overflowing its stack buffer v6. No authentication or user interaction is required, and successful exploitation can compromise router confidentiality, integrity, and availability.
Summary
What happened
Stack-based buffer overflow in Tenda FH1203 2.0.1.6 allows remote attackers to execute code or crash the router via a crafted entrys value. The fromAddressNat handler passes the user-controlled entrys and mitInterface strings to sprintf without a length check, overflowing its stack buffer v6. No authentication or user interaction is required, and successful exploitation can compromise router confidentiality, integrity, and availability.
The record
- CVE
- CVE-2023-37706
- Published
- Jul 10, 2023
- Updated
- Nov 12, 2024
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- FH1203
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 10, 2023CVE publishedPublication date reported by the CVE source.
- Nov 12, 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 FH1203 fromAddressNat demonstrationproof 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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