CVE-2020-1899

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The unserialize() function supported a type code, "S", which was meant to be supported only for APC serialization. This type code allowed arbitrary memory addresses to be accessed as if they were static StringData objects. This issue affected 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.

La función unserialize() admitía un código de tipo, "S", que estaba destinado a ser admitido solo para la serialización APC. Este código de tipo permitía acceder a direcciones de memoria arbitrarias como si fueran objetos StringData estáticos. Este problema afectó a 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

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* 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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-822: Untrusted Pointer Dereference

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/facebook/hhvm/commit/1107228a5128d3ca1c4add8ac1635d933cbbe2e9	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