9.8
CRITICAL
CVE-2020-1900
"HHVM unserialize Property Array Pre-Reservation Vulnerability"
Description

When unserializing an object with dynamic properties HHVM needs to pre-reserve the full size of the dynamic property array before inserting anything into it. Otherwise the array might resize, invalidating previously stored references. This pre-reservation was not occurring in HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.

INFO

Published Date :

March 11, 2021, 1:15 a.m.

Last Modified :

March 18, 2021, 2:10 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-1900 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Facebook hhvm
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-1900.

URL Resource
https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3 Patch Third Party Advisory
https://hhvm.com/blog/2020/06/30/security-update.html Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-1900 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-1900 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Mar. 18, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3 No Types Assigned https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3 Patch, Third Party Advisory
    Changed Reference Type https://hhvm.com/blog/2020/06/30/security-update.html No Types Assigned https://hhvm.com/blog/2020/06/30/security-update.html Vendor Advisory
    Added CWE NIST CWE-416
    Added CPE Configuration OR *cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* versions up to (excluding) 4.32.3 *cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* versions from (including) 4.33.0 up to (excluding) 4.56.1 *cpe:2.3:a:facebook:hhvm:4.57.0:*:*:*:*:*:*:* *cpe:2.3:a:facebook:hhvm:4.58.0:*:*:*:*:*:*:* *cpe:2.3:a:facebook:hhvm:4.58.1:*:*:*:*:*:*:* *cpe:2.3:a:facebook:hhvm:4.59.0:*:*:*:*:*:*:* *cpe:2.3:a:facebook:hhvm:4.60.0:*:*:*:*:*:*:* *cpe:2.3:a:facebook:hhvm:4.61.0:*:*:*:*:*:*:* *cpe:2.3:a:facebook:hhvm:4.62.0:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-1900 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-1900 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.24 }} 0.02%

score

0.62307

percentile

CVSS31 - Vulnerability Scoring System
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