ManageEngine EventLog Analyzer 10.0 – Information Disclosure

• Exploit Database
• 16 阅读

• 作者： Scott Goodwin
  日期： 2020-02-24
• 类别：

  • webapps
  平台：

  • java
• 来源：https://www.exploit-db.com/exploits/48119/

• # Exploit Title: ManageEngine EventLog Analyzer 10.0 - Information Disclosure
  # Date: 2020-02-23
  # Author:Scott Goodwin
  # Vendor: https://www.manageengine.com/
  # Software Link: https://www.manageengine.com/products/eventlog/
  # CVE: CVE-2019-19774
  
  Vulnerability Name: Authenticated Information Disclosure in ManageEngine EventLog Analyzer
  Registered: CVE-2019-19774
  
  Discoverer:
  Scott Goodwin, OSCP
  OCD Tech
  
  Vendor of Product:
  ManageEngine
  
  Affected Product Code Base:
  EventLog Analyzer - 10.0 SP1
  
  Affected Component:
  Affected ManageEngine endpoint: http://exampleclient:8400/event/runquery.do
  This endpoint allows the ManageEngine user to execute commands against the
  ManageEngine PostgreSQL database.
  
  Attack Type:
  Remote
  
  Vulnerability Type:
  Incorrect Access Control
  
  Vulnerability Impact:
  Authenticated Information Disclosure
  
  Attack Vector:
  To exploit the vulnerability, an authenticated user must execute a specially crafted
  query against the ManageEngine database to bypass the built-in security controls and
  extract credential data.
  
  Vulnerability Description:
  An issue was discovered in Zoho ManageEngine EventLog Analyzer 10.0 SP1.
  By running "select hostdetails from hostdetails" at the /event/runquery.do endpoint,
  it is possible to bypass the security restrictions that prevent even administrative
  users from viewing credential data stored in the database, and recover the MD5 hashes
  of the accounts used to authenticate the ManageEngine platform to the managed machines
  on the network (most often administrative accounts). Specifically, this bypasses the
  following restrictions: a query cannot mention "password", and a query result cannot
  have a "password" column.
  
  PoC: Run the database query: "select hostdetails from hostdetails" at the /event/runquery.do endpoint
  
  Reporting Timeline:
  10/30/2019: This vulnerability was reported to ManageEngine via the
  Zoho/ManageEngine Bug Bounty program. They acknowledged the initial report.
  12/12/2019: Vulnerability registered
  12/13/2019: Vulnerability acknowledged and update (12110) made available to ManageEngine
  customers.
  12/13/2019: Public disclosure
  
  Additional Information:
  This query bypasses the following security restrictions implemented within Manage Engine:
  1. restrictions on queries that include the word "password". This query will output the
  value stored in the "password" field, without the word "password" actually appearing in
  the query. If the query contains the word "password" Manage Engine will not execute the query.
  2. restrictions on printing the password field to the screen in a column called "password".
  If the results of the query include a columncalled "password", Manage Engine will mask the
  password with a series of asterisks "". This query will output the entire contents of the table,
  without formatting is as a table within the web interface, which leads to bypass of this security
  control.
  
  Remediated Product Version:
  ManageEngine EventLog Analyzer Build 12110
  
  Reference:
  https://www.manageengine.com/products/eventlog/
  https://www.manageengine.com/products/eventlog/features-new.html#release
  https://gist.github.com/scottgoodwin90/19ccecdc9f5733c0a9381765cfc7fe39
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19774
  https://ocd-tech.com