Cisco Security Advisory
Cisco Unified Communications Manager XML External Expansion Vulnerability
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CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:L/E:X/RL:X/RC:X
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A vulnerability in the web-based interface of Cisco Unified Communications Manager and Cisco Unified Communications Manager Session Management Edition (SME) could allow an unauthenticated, remote attacker to access sensitive information or cause a denial of service (DoS) condition.
The vulnerability is due to improper restrictions on XML entities. An attacker could exploit this vulnerability by sending malicious requests to an affected system that contain references in XML entities. A successful exploit could allow the attacker to retrieve files from the local system, resulting in the disclosure of sensitive information, or cause the application to consume available resources, resulting in a DoS condition.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-cucm-xxe
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Vulnerable Products
At the time of publication, this vulnerability affected the following Cisco Unified Communications Manager and Cisco Unified Communications Manager SME releases:
- 10.5(2) and earlier
- 11.5(1)SU5 and earlier
- 12.0(1)SU2 and earlier
- 12.5(1) and earlier
See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.
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There are no workarounds that address this vulnerability.
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When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
Fixed Releases
At the time of publication, the following Cisco Unified Communications Manager and Cisco Unified Communications Manager SME releases contained the fix for this vulnerability:
- 10.5(2)SU9 and later
- 12.0(1)SU3 and later
- 12.5(1)SU1 and later
See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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This vulnerability was found during internal security testing.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.1 Removed 11.5(1)SU6 and later Fixed Releases Final 2019-October-23 1.0 Initial public release. - Final 2019-October-02
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