CVE-2020-1900 is a critical deserialization vulnerability affecting HHVM versions prior to 4.32.3, and specific ranges between 4.33.0 and 4.62.0. The flaw stems from HHVM's failure to properly pre-reserve memory for dynamic properties during object unserialization, potentially leading to memory corruption. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with low attack complexity, allowing for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.
| 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: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.