icedtea-web Auto-Extraction Path Traversal Vulnerability [CVE-2019-10185]

CVE number – CVE-2019-10185

• A vulnerability in icedtea-web could allow an unauthenticated, remote attacker to write arbitrary files on a targeted system.
  
  The vulnerability exists in the auto-extraction feature of the affected software which could allow an attacker to conduct a zip-slip attack. An attacker could exploit this vulnerability by persuading a user to access a Java Archive (JAR) file that submits malicious input to the targeted system.
• A successful exploit could allow the attacker to write arbitrary files to arbitrary locations on the system. This vulnerability, when used in conjunction with CVE-2019-10181, could allow the attacker to replace the main running Java application and escape the sandbox. 
  
  The vendor has confirmed the vulnerability and released software updates.

Analysis

• To exploit this vulnerability, an attacker may use misleading language or instructions to persuade a user to access a JAR file that submits malicious input to the targeted system.

Safeguards

• Administrators are advised to apply the appropriate updates.
  
  Administrators are advised to allow only trusted users to have network access.
  
  Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
  
  Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
  
  Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
  
  Administrators are advised to monitor affected systems.

Vendor Announcements

• The vendor has released an issue report at the following link: Issue #327

Fixed Software

• The vendor has released software updates and a git commit at the following links: icedtea-web 1.8.3 and commit e0818f521a0711aeec4b913b49b5fc6a52815662