GPAC cat_multiple_files Function Buffer Overflow Vulnerability [CVE-2018-20762]

CVE Number – CVE-2018-20762

A vulnerability in the cat_multiple_files function of GPAC could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) on a targeted system.

The vulnerability exists in the cat_multiple_files function, as defined in the applications/mp4box/fileimport.c source code file of the affected software. An attacker could exploit this vulnerability by persuading a user to execute the MP4Box command on a multimedia file that submits malicious input to the targeted system. A successful exploit could trigger a buffer overflow condition that the attacker could use to execute arbitrary code or cause a DoS condition. 

Proof-of-concept (PoC) code that demonstrates an exploit of this vulnerability is publicly available. 

GPAC 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 execute the MP4Box command on a multimedia 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 use an unprivileged account when browsing the Internet.
  
  Administrators are advised to monitor critical systems.
  
  Users are advised not to open email messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in email messages are safe, they are advised not to open them.
  
  Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.

Vendor Announcements

• The GPAC Multimedia Open Source Project has released an issue report at the following link: Issue #1187

Fixed Software

• The GPAC Multimedia Open Source Project has released software updates at the following link: commit 35ab4475a7df9b2a4bcab235e379c0c3ec543658