CVE-2020-15598

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Trustwave ModSecurity 3.x through 3.0.4 allows denial of service via a special request. NOTE: The discoverer reports "Trustwave has signaled they are disputing our claims." The CVE suggests that there is a security issue with how ModSecurity handles regular expressions that can result in a Denial of Service condition. The vendor does not consider this as a security issue because1) there is no default configuration issue here. An attacker would need to know that a rule using a potentially problematic regular expression was in place, 2) the attacker would need to know the basic nature of the regular expression itself to exploit any resource issues. It's well known that regular expression usage can be taxing on system resources regardless of the use case. It is up to the administrator to decide on when it is appropriate to trade resources for potential security benefit

**EN DISPUTA** Trustwave ModSecurity versiones 3.x hasta 3.0.4, permite una denegación de servicio por medio de una petición especial. NOTA: El descubridor reporta que "Trustwave has signaled they are disputing our claims." El CVE sugiere que se presenta un problema de seguridad en como ModSecurity maneja unas expresiones regulares que pueden resultar en una condición de Denegación de Servicio. El proveedor no considera esto como un problema de seguridad porque 1) aquí no se presenta ningún problema de configuración predeterminada. Un atacante necesitaría saber que se presenta una regla que usa una expresión regular potencialmente problemática, 2) el atacante necesitaría conocer la naturaleza básica de la expresión regular en sí misma para explotar cualquier recurso. Es bien sabido que el uso de la expresión regular puede estar gravando los recursos del sistema, independientemente del caso de uso. Corresponde al administrador decidir cuándo es apropiado canjear los recursos para obtener un posible beneficio de seguridad

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-07-07 CVE Reserved
2020-09-15 CVE Published
2024-02-09 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

CAPEC

References (5)

URL	Tag	Source
http://packetstormsecurity.com/files/159185/ModSecurity-3.0.x-Denial-Of-Service.html	Third Party Advisory
http://seclists.org/fulldisclosure/2020/Sep/32	Mailing List
https://www.debian.org/security/2020/dsa-4765	Third Party Advisory

URL	Date	SRC
https://coreruleset.org/20200914/cve-2020-15598	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://www.modsecurity.org	2024-05-17

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Trustwave Search vendor "Trustwave"		Modsecurity Search vendor "Trustwave" for product "Modsecurity"				>= 3.0.0 <= 3.0.4 Search vendor "Trustwave" for product "Modsecurity" and version " >= 3.0.0 <= 3.0.4"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected