Remote Code Execution in PHP Affected by Improper IFD Size Validation
CVE-2016-4543

9.8CRITICAL

Key Information:

Vendor: HP
Status: System Management Homepage
Vendor: CVE Published:; 22 May 2016

What is CVE-2016-4543?

The exif_process_IFD_in_JPEG function within PHP prior to versions 5.5.35, 5.6.21, and 7.0.6 fails to correctly validate Image File Directory (IFD) sizes. This oversight allows attackers to exploit the vulnerability, potentially leading to a denial of service via out-of-bounds reads. By crafting specific header data, attackers can disrupt normal operation of affected PHP installations.