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Vigil@nce - Cisco Unified MeetingPlace: external XML entity injection

August 2015 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can transmit malicious XML data to Cisco Unified
MeetingPlace, in order to read a file, scan sites, or trigger a
denial of service.

Impacted products: Cisco Unified Meeting Place

Severity: 2/4

Creation date: 01/06/2015

DESCRIPTION OF THE VULNERABILITY

XML data can contain external entities (DTD):



A program which reads these XML data can replace these entities by
data coming from the indicated file. When the program uses XML
data coming from an untrusted source, this behavior leads to:

- content disclosure from files of the server

- private web site scan

- a denial of service by opening a blocking file

This feature must be disabled to process XML data coming from an
untrusted source.

However, the Cisco Unified MeetingPlace parser allows external
entities.

An attacker can therefore transmit malicious XML data to Cisco
Unified MeetingPlace, in order to read a file, scan sites, or
trigger a denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Cisco-Unified-MeetingPlace-external-XML-entity-injection-17023


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