CVE-2019-3557 is a critical out-of-bounds read vulnerability affecting all supported versions of HHVM (3.30 and 3.27.4 and below). It stems from improperly implemented readImpl functions in bz2 and php://output streams, leading to an out-of-bounds read when certain stream functions are used. With a CVSS score of 9.8 (CRITICAL), this vulnerability is remotely exploitable with low attack complexity, potentially leading to high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 3.27.4CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
>= 3.28.0, <= 3.30.0CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
< 3.27.5CPE 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.