CVE-2020-1918

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In-memory file operations (ie: using fopen on a data URI) did not properly restrict negative seeking, allowing for the reading of memory prior to the in-memory buffer. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.

Las operaciones de archivos en memoria (es decir, usando fopen en un URI de datos) no restringieron apropiadamente la búsqueda negativa, permitiendo la lectura de la memoria antes del búfer en memoria. Este problema afecta HHVM versiones anteriores a 4.56.3, todas las versiones entre 4.57.0 y 4.80.1, todas las versiones entre 4.81.0 y 4.93.1 y las versiones 4.94.0, 4.95.0, 4.96.0, 4.97.0 , 4.98.0

*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
2021-03-10 CVE Published
2023-11-24 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-125: Out-of-bounds Read
CWE-127: Buffer Under-read

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca	2021-03-15

URL	Date	SRC
https://hhvm.com/blog/2021/02/25/security-update.html	2021-03-15

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"				< 4.56.3 Search vendor "Facebook" for product "Hhvm" and version " < 4.56.3"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				>= 4.57.0 < 4.80.2 Search vendor "Facebook" for product "Hhvm" and version " >= 4.57.0 < 4.80.2"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				>= 4.81.0 < 4.93.2 Search vendor "Facebook" for product "Hhvm" and version " >= 4.81.0 < 4.93.2"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.94.0 Search vendor "Facebook" for product "Hhvm" and version "4.94.0"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.95.0 Search vendor "Facebook" for product "Hhvm" and version "4.95.0"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.96.0 Search vendor "Facebook" for product "Hhvm" and version "4.96.0"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.97.0 Search vendor "Facebook" for product "Hhvm" and version "4.97.0"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				4.98.0 Search vendor "Facebook" for product "Hhvm" and version "4.98.0"		-		Affected