CVE-2021-1530

Cisco BroadWorks Messaging Server XML External Entity Injection Vulnerability

Severity Score

7.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

A vulnerability in the web-based management interface of Cisco BroadWorks Messaging Server Software could allow an authenticated, remote attacker to access sensitive information or cause a partial denial of service (DoS) condition on an affected system. This vulnerability is due to improper handling of XML External Entity (XXE) entries when parsing certain XML files. An attacker could exploit this vulnerability by uploading a crafted XML file that contains references to external entities. A successful exploit could allow the attacker to retrieve files from the local system, resulting in the disclosure of sensitive information, or cause the application to consume available resources, resulting in a partial DoS condition on an affected system. There are workarounds that address this vulnerability.

Una vulnerabilidad en la interfaz de administración basada en web de Cisco BroadWorks Messaging Server Software, podría permitir a un atacante remoto autenticado acceder a información confidencial o causar una condición de denegación de servicio parcial (DoS) en un sistema afectado. Esta vulnerabilidad es debido al manejo inapropiado de las entradas XML External Entity (XXE) al analizar determinados archivos XML. Un atacante podría explotar esta vulnerabilidad al cargar un archivo XML diseñado que contiene referencias a entidades externas. Una explotación con éxito podría permitir al atacante recuperar archivos del sistema local, resultando en una divulgación de información confidencial, o hacer que la aplicación consumiera los recursos disponibles, resultando en una condición de DoS parcial en un sistema afectado. Hay soluciones alternativas que abordan esta vulnerabilidad

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2021-05-06 CVE Published
2023-07-29 EPSS Updated
2024-11-08 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-611: Improper Restriction of XML External Entity Reference

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bwms-xxe-uSLrZgKs	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Broadworks Messaging Server Search vendor "Cisco" for product "Broadworks Messaging Server"				22.0 Search vendor "Cisco" for product "Broadworks Messaging Server" and version "22.0"		-		Affected