CVE-2020-1900

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Cuando se anula la serialización de un objeto con propiedades dinámicas, HHVM necesita reservar previamente el tamaño completo de la matriz de propiedades dinámicas antes de insertar algo en ella. De lo contrario, la matriz podría cambiar de tamaño, invalidando las referencias almacenadas previamente. Esta reserva previa no estaba ocurriendo en HHVM versiones anteriores a v4.32.3, entre las versiones 4.33.0 y 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62 .0

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-02 CVE Reserved
2021-03-11 CVE Published
2023-11-24 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3	2021-03-18

URL	Date	SRC
https://hhvm.com/blog/2020/06/30/security-update.html	2021-03-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				< 4.32.3 Search vendor "Facebook" for product "Hhvm" and version " < 4.32.3"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				>= 4.33.0 < 4.56.1 Search vendor "Facebook" for product "Hhvm" and version " >= 4.33.0 < 4.56.1"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.57.0 Search vendor "Facebook" for product "Hhvm" and version "4.57.0"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.58.0 Search vendor "Facebook" for product "Hhvm" and version "4.58.0"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.58.1 Search vendor "Facebook" for product "Hhvm" and version "4.58.1"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.59.0 Search vendor "Facebook" for product "Hhvm" and version "4.59.0"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.60.0 Search vendor "Facebook" for product "Hhvm" and version "4.60.0"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.61.0 Search vendor "Facebook" for product "Hhvm" and version "4.61.0"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.62.0 Search vendor "Facebook" for product "Hhvm" and version "4.62.0"		-		Affected