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Vulnerability of EMC VNX, Celerra: NTLM authentication bypass

Synthesis of the vulnerability 

An attacker can reuse secrets while running an NTLM authentication with EMC VNX and Celerra, in order to spoof a user identity.
Impacted systems: EMC CAVA, EMC CEE, EMC CEPA, Celerra FAST, Celerra NS, Celerra NX4, VNX Operating Environment, VNX Series.
Severity of this alert: 3/4.
Creation date: 20/09/2016.
Références of this alert: CVE-2016-0917, ESA-2016-096, VIGILANCE-VUL-20651.

Description of the vulnerability 

The products EMC VNX and Celerra include a CIFS access.

Accessing a host via CIFS normally requires a NTLM based authentication. However, one can make VNX and Celerra use a nonce several times in the cryptographic protocol. See also VIGILANCE-VUL-9436.

An attacker can therefore reuse secrets while running an NTLM authentication with EMC VNX and Celerra, in order to spoof a user identity.
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This computer weakness announce impacts software or systems such as EMC CAVA, EMC CEE, EMC CEPA, Celerra FAST, Celerra NS, Celerra NX4, VNX Operating Environment, VNX Series.

Our Vigil@nce team determined that the severity of this security alert is important.

The trust level is of type confirmed by the editor, with an origin of intranet client.

An attacker with a expert ability can exploit this vulnerability.

Solutions for this threat 

EMC VNX, Celerra: fixed versions.
Fixed versions are indicated in information sources.
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