Remote compromise via radiusSecret overflow
Published Aug 21, 2023 · Updated Oct 7, 2024
Buffer overflow in TP-Link TL-WR841N V8, TL-WR940N V2, and TL-WR941ND V5 allows remote attackers to compromise routers via crafted HTTP requests. The /userRpm/WlanSecurityRpm handler copies the radiusSecret parameter without checking its length, overflowing a memory buffer. Unauthenticated network access to the web interface is sufficient; malformed input causes memory corruption with denial of service and potential code execution.
Summary
What happened
Buffer overflow in TP-Link TL-WR841N V8, TL-WR940N V2, and TL-WR941ND V5 allows remote attackers to compromise routers via crafted HTTP requests. The /userRpm/WlanSecurityRpm handler copies the radiusSecret parameter without checking its length, overflowing a memory buffer. Unauthenticated network access to the web interface is sufficient; malformed input causes memory corruption with denial of service and potential code execution.
The record
- CVE
- CVE-2023-39747
- Published
- Aug 21, 2023
- Updated
- Oct 7, 2024
- Vendor
- TP-Link
- Product
- TL-WR940N
- Classifications
- CWE-120, T1210
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 21, 2023CVE publishedPublication date reported by the CVE source.
- Oct 7, 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=2.0
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.
Weakness, pattern, technique
Public exploit references
- TP-Link WR841N wireless router WlanSecurityRpm Stack Overflow vulnerabilityproof 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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