Description
A stack buffer overflow exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within the sysconf binary (sub_401EE0 function). The binary reads the /proc/stat file using fgets() into a local buffer and subsequently parses the line using sscanf() into a single-byte variable with the %s format specifier. Maliciously crafted /proc/stat content can overwrite adjacent stack memory, potentially allowing an attacker with filesystem write privileges to execute arbitrary code on the device.
Details
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| a720r-firmware | — | — |
References
Similar Threats
- Medium CVE-2025-60682
- Medium CVE-2025-60683
- Medium CVE-2025-60686
- High CVE-2025-9303
- Medium CVE-2025-4268
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