Industrial Light & Magic OpenEXR makeMultiView.cpp Out-of-Bounds Write Vulnerability [CVE-2018-18444]

CVE Number – CVE-2018-18444

A vulnerability in Industrial Light & Magic OpenEXR could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to an out-of-bounds write condition that exists in the exrmultiview function, as defined in the makeMultiView.cpp source code file of the affected software. An attacker could exploit this vulnerability by persuading a user to access an OpenEXR image file that submits malicious input to the targeted system. A successful exploit could cause an assertion failure, resulting in a DoS condition. 

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

Industrial Light & Magic has not confirmed the vulnerability and software updates are not available.

Analysis

• To exploit this vulnerability, an attacker may use misleading language and instructions to persuade a user to access an OpenEXR image file that submits malicious input to the targeted system.
  
  Although a successful exploit could cause an assertion failure resulting in a DoS condition, it may be possible for an exploit of this vulnerability to have other unspecified impacts.

Safeguards

• Administrators are advised to contact the vendor regarding future updates and releases.
  
  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

• At the time this alert was first published, an issue report regarding this vulnerability had been published in the upstream issue tracking system at the following link: Issue #351. However, the issue had not yet been accepted or confirmed.

Fixed Software

• At the time this alert was first published, Industrial Light & Magic had not released software updates.