Service crash via null pointer dereference
Published Nov 6, 2024 · Updated Nov 7, 2024
Buffer overflow in Tenda O3 Firmware 1.0.0.5 allows remote attackers on an adjacent network to crash the router with malformed HTTP. In websReadEvent, a specially formatted POST request drives the request state to 8 while leaving query data present, after which strlen dereferences a null pointer. The HTTP service must be reachable from the attacker's adjacent network; successful exploitation triggers a segmentation fault and interrupts router availability.
Summary
What happened
Buffer overflow in Tenda O3 Firmware 1.0.0.5 allows remote attackers on an adjacent network to crash the router with malformed HTTP. In websReadEvent, a specially formatted POST request drives the request state to 8 while leaving query data present, after which strlen dereferences a null pointer. The HTTP service must be reachable from the attacker's adjacent network; successful exploitation triggers a segmentation fault and interrupts router availability.
The record
- CVE
- CVE-2024-51409
- Published
- Nov 6, 2024
- Updated
- Nov 7, 2024
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- Tenda O3 Firmware
- Classifications
- CWE-120, T1499
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 6, 2024CVE publishedPublication date reported by the CVE source.
- Nov 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=1.0.0.5
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
- Tenda O3 websReadEvent denial-of-service proof of conceptproof 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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