Authenticated code execution via SSID stack overflow
Published Apr 2, 2020 · Updated Aug 4, 2024
Buffer overflow in TP-Link TL-WR841N V10 firmware 3.16.9 allows remote authenticated users to execute arbitrary code via a GET request. The popupSiteSurveyRpm_AP handler copies the unbounded ssid parameter into a 68-byte stack buffer, and stringModify can expand escaped characters without accounting for destination capacity. Administrative web-interface credentials are required; successful exploitation controls the return address and executes code as root on the router.
Summary
What happened
Buffer overflow in TP-Link TL-WR841N V10 firmware 3.16.9 allows remote authenticated users to execute arbitrary code via a GET request. The popupSiteSurveyRpm_AP handler copies the unbounded ssid parameter into a 68-byte stack buffer, and stringModify can expand escaped characters without accounting for destination capacity. Administrative web-interface credentials are required; successful exploitation controls the return address and executes code as root on the router.
The record
- CVE
- CVE-2020-8423
- Published
- Apr 2, 2020
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 2, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- CVE-2020-8423 MIPS router exploitfunctional · demonstrated
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Technologies
Your stack
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Your stack
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