CVE-2020-1899 is a high-severity vulnerability affecting HHVM versions prior to 4.32.3 and various versions between 4.33.0 and 4.62.0. It stems from the unserialize() function's improper handling of the "S" type code, allowing arbitrary memory addresses to be accessed as static StringData objects. With a CVSS score of 7.5 (High), this vulnerability can be exploited remotely with low attack complexity, potentially leading to high confidentiality impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.32.3CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
>= 4.33.0, < 4.56.1CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
4.57.0CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:4.57.0:*:*:*:*:*:*:* | ||
4.58.0CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:4.58.0:*:*:*:*:*:*:* | ||
4.58.1CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:4.58.1:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.