Administrator access via trusted URL authentication code
Published Mar 12, 2024 · Updated Aug 28, 2024
Authentication bypass in TOTOLINK A8000RU Firmware 7.1cu.643_B20200521 allows attackers to obtain an administrator session. The lighttpd userloginAuth function trusts the URL-supplied authCode value and creates a session when authCode equals 1 instead of accepting only the CGI-generated result. Attackers must reach the router's management interface, and a crafted formLoginAuth.htm request grants administrator access without valid credentials.
Summary
What happened
Authentication bypass in TOTOLINK A8000RU Firmware 7.1cu.643_B20200521 allows attackers to obtain an administrator session. The lighttpd userloginAuth function trusts the URL-supplied authCode value and creates a session when authCode equals 1 instead of accepting only the CGI-generated result. Attackers must reach the router's management interface, and a crafted formLoginAuth.htm request grants administrator access without valid credentials.
The record
- CVE
- CVE-2024-28338
- Published
- Mar 12, 2024
- Updated
- Aug 28, 2024
- Vendor
- TOTOLINK
- Product
- A8000RU Firmware
- Classifications
- CWE-284, T1190
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 12, 2024CVE publishedPublication date reported by the CVE source.
- Aug 28, 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=7.1cu.643_B20200521
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
- TOTOLINK A8000RU login-bypass proof of conceptproof 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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