CVE-2018-6334

Published: Dec 31, 2018Modified: Jun 17, 2026

9.8

Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

Multipart-file uploads call variables to be improperly registered in the global scope. In cases where variables are not declared explicitly before being used this can lead to unexpected behavior. This affects all supported versions of HHVM prior to the patch (3.25.1, 3.24.5, and 3.21.9 and below).

Affected (3)

Products: Facebook: Hhvm

1 product

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Facebook Hhvm	Up to 3.21.9
Facebook Hhvm	From 3.21.10 to 3.24.5
Facebook Hhvm	From 3.24.6 to 3.25.1

Related CWEs

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Variable Extraction Error

The product uses external input to determine the names of variables into which information is extracted, without verifying that the names of the specified variables are valid. This could cause the program to overwrite unintended variables.

References (4)

https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff

Source: cve-assign@fb.com

PatchThird Party Advisory

https://hhvm.com/blog/2018/03/30/hhvm-3.25.2.html

Source: cve-assign@fb.com

PatchThird Party Advisory

https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://hhvm.com/blog/2018/03/30/hhvm-3.25.2.html

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

Timeline

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