CVE-2018-6334 is a critical vulnerability affecting all supported versions of HHVM prior to 3.25.1, 3.24.5, and 3.21.9. It stems from improper registration of variables in the global scope during multipart-file uploads, leading to unexpected behavior when variables are not explicitly declared. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with low complexity, allowing for complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no public exploit code available, no evidence of active exploitation, and minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 3.21.9CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
>= 3.21.10, <= 3.24.5CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
>= 3.24.6, <= 3.25.1CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
< 3.21.10CPE match | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.