CVE-2018-6334

moderate-risk

Published 2018-12-31

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).

Do I need to act?

0.63% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (1)

Hhvm

Affected Vendors

Facebook

References (4)

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

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

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

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

/ 100

moderate-risk

Severity 32/34 · Critical

Exploitability 2/34 · Minimal

Exposure 5/34 · Minimal