Отправить #855121: Tomato by Shibby Tomato Firmware Tomato v1.28 RT-N5x MIPSR2 build 132 Max Stack-based Buffer Overflow

sub_407220 renders DNS server information into a JavaScript array. It allocates a fixed 128-byte stack buffer and appends each DNS entry with sprintf(&buf[strlen(buf)], ...) in a loop. The number of entries is taken from get_dns(), and the function does not verify that the accumulated string still fits in the destination buffer.

char buf[128];

dns = get_dns();
strcpy(buf, "\ndns = [");

for (i = 0; i < dns[0]; ++i) {
size_t len = strlen(buf);
char *ip = inet_ntoa((struct in_addr)dns[2 * i + 1]);
sprintf(&buf[len], "%s'%s:%u'", i ? "," : "", ip, port);
}

strcat(buf, "];\n");
web_puts(buf);
With 8 ordinary DNS entries, the generated string reaches approximately 146 bytes before the final NUL terminator, exceeding the 128-byte stack buffer.

• Источник: ⚠️ https://gitee.com/Fengyi-Wang/CVE/issues/IJTQ5R
• Пользователь: Cormac315 (UID 97273)
• Представление: 10.06.2026 16:08 (1 месяц назад)
• Модерация: 12.07.2026 23:01 (1 month later)
• Статус: принято
• Запись VulDB: 377898 [Shibby Tomato до 1.28.0000 DNS List Rendering /usr/sbin/httpd sub_407220 повреждение памяти]
• Баллы: 20