Cisco Nexus Dashboard Fabric Controller XML External Entity Processing Information Disclosure Vulnerability

March 11th, 2022
ZDI-22-508 ZDI-CAN-15192

CVE ID

CVE-2015-3269

CVSS Score

7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors

Cisco

Affected Products

Nexus Dashboard Fabric Controller

Vulnerability Details

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Cisco Nexus Dashboard Fabric Controller. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of the AMF protocol. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of the fmserver user.

Additional Details

Fixed in version 11.5(4) or later


Disclosure Timeline

  • 2021-09-10 - Vulnerability reported to vendor
  • 2022-03-11 - Coordinated public release of advisory

Credit

kpc

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