Remote Code Execution in PHP Affected by Improper IFD Size Validation
CVE-2016-4543
9.8CRITICAL
Summary
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.
References
CVSS V3.1
Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged
Timeline
Vulnerability published
Vulnerability Reserved