Authenticated router compromise via services_array stack overflow
Published Sep 4, 2024 · Updated Sep 4, 2024
Stack-based buffer overflow in Linksys WRT54G 4.21.5 allows remote authenticated users to corrupt router memory via a crafted POST. The validate_services_port function in /apply.cgi parses services_array entries without an effective length bound before copying an entry name into a fixed-size stack buffer. Access to the router's web-based management utility is required, and successful exploitation can disclose or alter router data and interrupt service.
Summary
What happened
Stack-based buffer overflow in Linksys WRT54G 4.21.5 allows remote authenticated users to corrupt router memory via a crafted POST. The validate_services_port function in /apply.cgi parses services_array entries without an effective length bound before copying an entry name into a fixed-size stack buffer. Access to the router's web-based management utility is required, and successful exploitation can disclose or alter router data and interrupt service.
The record
- CVE
- CVE-2024-8408
- Published
- Sep 4, 2024
- Updated
- Sep 4, 2024
- Vendor
- Linksys
- Product
- WRT54G
- Classifications
- CWE-787, CWE-121, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 4, 2024CVE publishedPublication date reported by the CVE source.
- Sep 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.21.5
What conditions does exploitation require?
What is affected?
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
- Linksys WRT54G validate_services_port 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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