CVE-2018-6345

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large. The internal implementation of the function will cause a string to be created with an invalid length, which can then interact poorly with other functions. This affects all supported versions of HHVM (3.30.1 and 3.27.5 and below).

La función number_format es vulnerable a un problema de desbordamiento de memoria dinámica (heap) cuando su segundo argumento ($dec_points) es excesivamente largo. La implementación interna de la función provocará que se cree una cadena con una longitud inválida, que puede interactuar pobremente con otras funciones. Esto afecta a todas las versiones soportadas de HVVM (en versiones anteriores a las 3.30.1 y 3.27.5).

*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

2018-01-26 CVE Reserved
2019-01-15 CVE Published
2023-03-07 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-122: Heap-based Buffer Overflow
CWE-787: Out-of-bounds Write

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/facebook/hhvm/commit/190ffdf6c8b1ec443be202c7d69e63a7e3da25e3	2020-09-21

URL	Date	SRC
https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.html	2020-09-21

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"				<= 3.27.5 Search vendor "Facebook" for product "Hhvm" and version " <= 3.27.5"		-		Affected
Facebook Search vendor "Facebook"		Hhvm Search vendor "Facebook" for product "Hhvm"				>= 3.28.0 <= 3.30.1 Search vendor "Facebook" for product "Hhvm" and version " >= 3.28.0 <= 3.30.1"		-		Affected