CVE-2019-11048: Temporary files are not cleaned after OOM when parsing HTTP request data

Vulnerability summary

CVE-2019-11048 is a medium (CVSS 5.3) Integer Overflow or Wraparound vulnerability in php group php. EPSS estimates a 6.26% chance of exploitation in the next 30 days, higher than 93.5% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 20-05-2020
   PublishedVulnerability first disclosed.
2. 16-09-2024
   Last modifiedVulnerability information updated.

Description

In PHP versions 7.2.x below 7.2.31, 7.3.x below 7.3.18 and 7.4.x below 7.4.6, when HTTP file uploads are allowed, supplying overly long filenames or field names could lead PHP engine to try to allocate oversized memory storage, hit the memory limit and stop processing the request, without cleaning up temporary files created by upload request. This potentially could lead to accumulation of uncleaned temporary files exhausting the disk space on the target server.

• 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.
• CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.