CVE-2018-6334

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).

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

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

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff	Patch Third Party Advisory
https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff	Patch Third Party Advisory
https://hhvm.com/blog/2018/03/30/hhvm-3.25.2.html	Patch Third Party Advisory
https://hhvm.com/blog/2018/03/30/hhvm-3.25.2.html	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:facebook:hhvm::::::::
	cpe:2.3:a:facebook:hhvm::::::::
	cpe:2.3:a:facebook:hhvm::::::::

History

06 May 2025, 17:15

Type	Values Removed	Values Added
References	~~(MISC) https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff - Patch, Third Party Advisory~~	() https://github.com/facebook/hhvm/commit/6937de5544c3eead3466b75020d8382080ed0cff - Patch, Third Party Advisory
References	~~(MISC) https://hhvm.com/blog/2018/03/30/hhvm-3.25.2.html - Patch, Third Party Advisory~~	() https://hhvm.com/blog/2018/03/30/hhvm-3.25.2.html - Patch, Third Party Advisory

Information

Published : 2018-12-31 19:29

Updated : 2025-05-06 17:15

NVD link : CVE-2018-6334

Mitre link : CVE-2018-6334

JSON object : View

Products Affected

facebook

hhvm

CWE

CWE-20

Improper Input Validation

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