CVE-2020-3256

Cisco Hosted Collaboration Mediation Fulfillment XML External Expansion Vulnerability

Severity Score

4.9

*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 Hosted Collaboration Mediation Fulfillment (HCM-F) Software could allow an authenticated, remote attacker to gain read access to information that is stored on an affected system. To exploit this vulnerability, an attacker would need administrative privileges on the Cisco HCM-F Software. The vulnerability is due to improper handling of XML External Entity (XXE) entries when parsing certain XML files. An attacker could exploit this vulnerability by sending malicious requests that contain references in XML entities to an affected system. A successful exploit could allow the attacker to retrieve files from the local system, resulting in the disclosure of sensitive information.

Una vulnerabilidad en la interfaz de administración basada en web del Cisco Hosted Collaboration Mediation Fulfillment (HCM-F) Software, podría permitir a un atacante remoto autenticado conseguir acceso de lectura a la información que es almacenada sobre un sistema afectado. Para explotar esta vulnerabilidad, un atacante necesitaría privilegios administrativos en el Cisco HCM-F Software. La vulnerabilidad es debido al manejo inapropiado de entradas XML External Entity (XXE) cuando se analizan determinados archivos XML. Un atacante podría explotar esta vulnerabilidad mediante el envío de peticiones maliciosas que contienen referencias en entidades XML hacia un sistema afectado. Una explotación con éxito podría permitir a un atacante recuperar archivos desde el sistema local, resultando una divulgación de información confidencial.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2019-12-12 CVE Reserved
2020-05-06 CVE Published
2024-01-22 EPSS Updated
2024-11-15 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-hcmf-xxe-qqCMAUJ2	2020-05-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Hosted Collaboration Mediation Fulfillment Search vendor "Cisco" for product "Hosted Collaboration Mediation Fulfillment"				< 12.5\(1\)su2 Search vendor "Cisco" for product "Hosted Collaboration Mediation Fulfillment" and version " < 12.5\(1\)su2"		-		Affected