Unauthenticated DoS via stack buffer overflow
Published Mar 9, 2022 · Updated Aug 4, 2024
A stack buffer overflow in Tenda AX12 v22.03.01.21 allows remote attackers to cause a denial of service via crafted strcpy input. Function sub_422CE4 copies the attacker-controlled prefixDelegate value with strcpy into a fixed stack buffer without bounds checking. An unauthenticated network HTTP request can trigger the overflow and crash the router service, producing an availability-only interruption.
Summary
What happened
A stack buffer overflow in Tenda AX12 v22.03.01.21 allows remote attackers to cause a denial of service via crafted strcpy input. Function sub_422CE4 copies the attacker-controlled prefixDelegate value with strcpy into a fixed stack buffer without bounds checking. An unauthenticated network HTTP request can trigger the overflow and crash the router service, producing an availability-only interruption.
The record
- CVE
- CVE-2021-46408
- Published
- Mar 9, 2022
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 9, 2022CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- IoT-CVE Tenda AX12 stack-overflow proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo