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SYNTHESIS OF THE VULNERABILITY

An attacker can transmit malicious XML data to EMC VNX/Unisphere,
in order to read a file, scan sites, or trigger a denial of
service.

Impacted products: Unisphere EMC, VNX Operating Environment, VNX
Series.

Severity: 2/4.

Creation date: 26/04/2018.

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 EMC VNX/Unisphere parser allows external entities.

An attacker can therefore transmit malicious XML data to EMC
VNX/Unisphere, in order to read a file, scan sites, or trigger a
denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/EMC-VNX-Unisphere-external-XML-entity-injection-25984