busybox is vulnerable to information disclosure. An out of bounds read in the udhcp components allows a remote attacker to leak confidential information from the stack by sending malicious DHCP messages.
packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
seclists.org/fulldisclosure/2019/Sep/7
bugs.busybox.net/show_bug.cgi?id=11506
busybox.net/news.html
git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c
seclists.org/bugtraq/2019/Sep/7
usn.ubuntu.com/3935-1/