CVE-2020-1893 describes an out-of-bounds read vulnerability in HHVM's JSON decoding function, TryParse, affecting numerous versions of HHVM from 4.9.0 up to 4.45.0. This flaw stems from insufficient boundary checks, allowing an attacker to potentially trigger a Denial of Service (DoS) condition. With a CVSS score of 7.5 (High), this vulnerability can be exploited remotely with low attack complexity and no user interaction, leading to high availability impact. Currently, there is no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.8.7CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
>= 4.9.0, <= 4.32.0CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
>= 4.33.0, <= 4.38.0CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | ||
4.39.0CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:4.39.0:*:*:*:*:*:*:* | ||
4.40.0CPE matchmatch criteria | cpe:2.3:a:facebook:hhvm:4.40.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.