Cisco Data Center Network Manager XML External Entity Information Disclosure Vulnerability

Risk

Medium

Date Discovered

January 2, 2020

Description

Cisco Data Center Network Manager is prone to an information-disclosure vulnerability. An attacker can exploit this issue to gain access to sensitive information that may lead to further attacks. This issue is being tracked by Cisco bug IDs CSCvr79188, CSCvr88730 and CSCvr88737. Cisco Data Center Network Manager versions prior to 11.3(1) are vulnerable.

Technologies Affected

  • Cisco Data Center Network Manager 10.0(1)
  • Cisco Data Center Network Manager 10.1(1)
  • Cisco Data Center Network Manager 10.2(1)
  • Cisco Data Center Network Manager 10.3(1)
  • Cisco Data Center Network Manager 10.4(1)
  • Cisco Data Center Network Manager 10.4(2)
  • Cisco Data Center Network Manager 11.0(1)
  • Cisco Data Center Network Manager 11.1(1)
  • Cisco Data Center Network Manager 11.2(1)
  • Cisco Data Center Network Manager 5.2(1)

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, run all applications with the minimal amount of privileges required for functionality.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include suspicious URI sequences.

Updates are available. Please see the references or vendor advisory for more information.

References

Credits

Steven Seeley (mr_me) of Source Incite, working with Trend Micro’s Zero Day Initiative and iDefense, Accenture


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