CVE-2018-6345 describes a critical heap overflow vulnerability in the number_format function within all supported versions of HHVM (3.30.1 and 3.27.5 and below). An excessively large second argument to this function can lead to the creation of a string with an invalid length, potentially causing further issues. With a CVSS score of 9.8 (CRITICAL), this vulnerability is remotely exploitable with low attack complexity, allowing for high impact on confidentiality, integrity, and availability. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, indicating potential interest.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 3.27.5CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
>= 3.28.0, <= 3.30.1CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
< 3.27.6CPE match | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/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.