Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146 devices allows remote attackers to execute arbitrary code via a long POST request to the login_action function in /cgi-bin/login_action.cgi (aka cgipage.cgi).
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
Link | Tags |
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https://twitter.com/ankit_anubhav/status/982261670394249216 | |
https://blogs.securiteam.com/index.php/archives/3552 | third party advisory exploit |
https://pastebin.com/Yxd9S46A |