Adjacent-network code execution via unchecked upload length
Published Jun 18, 2024 · Updated Aug 1, 2024
Stack-based buffer overflow in Actiontec WCB6200Q 1.2L.03.5 allows remote attackers on the adjacent network to execute code without authentication. The uh_get_postdata_withupload path copies attacker-controlled upload data into a fixed-length stack buffer without first validating its length. A crafted request can corrupt the HTTP server stack and run code in that server's context, but the attacker must reach the extender from an adjacent network.
Summary
What happened
Stack-based buffer overflow in Actiontec WCB6200Q 1.2L.03.5 allows remote attackers on the adjacent network to execute code without authentication. The uh_get_postdata_withupload path copies attacker-controlled upload data into a fixed-length stack buffer without first validating its length. A crafted request can corrupt the HTTP server stack and run code in that server's context, but the attacker must reach the extender from an adjacent network.
The record
- CVE
- CVE-2024-6146
- Published
- Jun 18, 2024
- Updated
- Aug 1, 2024
- Vendor
- ActionTech
- Product
- WCB6200Q
- Classifications
- CWE-787, CWE-121, T1190
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 18, 2024CVE publishedPublication date reported by the CVE source.
- Aug 1, 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=1.2L.03.5
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
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Technologies
Your stack
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Your stack
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