CVE-2016-5769: php Integer Overflow or Wraparound

Vulnerability summary

CVE-2016-5769 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in php. EPSS estimates a 8.36% chance of exploitation in the next 30 days, higher than 94.9% of scored vulnerabilities.

Timeline

1. 07-08-2016
   PublishedVulnerability first disclosed.
2. 06-08-2024
   Last modifiedVulnerability information updated.

Description

Multiple integer overflows in mcrypt.c in the mcrypt extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 allow remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted length value, related to the (1) mcrypt_generic and (2) mdecrypt_generic functions.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.