CVE-2017-17671

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but ..\ traversal is not blocked. For example, an attacker can make an invalid HTTP request containing PHP code, and then make an index.php?routestring= request with enough instances of ".." to reach an Apache HTTP Server log file.

vBulletin hasta las versiones 5.3.x en Windows permite la ejecución remota de código PHP debido a que una llamada require_once es alcanzable con una petición que puede incluir secuencias de salto de directorio para especificar un nombre de ruta arbitrario y porque el salto ../ está bloqueado, pero el salto ..\ no lo está. Por ejemplo, un atacante puede realizar una petición HTTP inválida que contiene código PHP y, a continuación, realizar una petición index.php?routestring= con las suficientes instancias de ".." para alcanzar un archivo de registro de Apache HTTP Server.

*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

2017-12-13 CVE Reserved
2017-12-14 CVE Published
2024-07-17 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://blogs.securiteam.com/index.php/archives/3569	2024-08-05

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Vbulletin Search vendor "Vbulletin"	Vbulletin Search vendor "Vbulletin" for product "Vbulletin"	>= 5.0.1 <= 5.3.3 Search vendor "Vbulletin" for product "Vbulletin" and version " >= 5.0.1 <= 5.3.3"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Vbulletin Search vendor "Vbulletin"	Vbulletin Search vendor "Vbulletin" for product "Vbulletin"	5.0.0 Search vendor "Vbulletin" for product "Vbulletin" and version "5.0.0"	beta_11	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Vbulletin Search vendor "Vbulletin"	Vbulletin Search vendor "Vbulletin" for product "Vbulletin"	5.0.0 Search vendor "Vbulletin" for product "Vbulletin" and version "5.0.0"	beta_28	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe