cisco-sa-20190703-cucm-dos: Cisco Unified Communications Manager Session Initiation Protocol Denial of Service Vulnerability

Published Jul 3, 2019
·
Updated

A vulnerability in the Session Initiation Protocol (SIP) protocol implementation of Cisco Unified Communications Manager and Unified Communications Manager Session Management Edition could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to insufficient validation of input SIP traffic. An attacker could exploit this vulnerability by sending a malformed SIP packet to an affected Cisco Unified Communications Manager or Unified Communications Manager Session Management Edition. A successful exploit could allow the attacker to trigger a new registration process on all connected phones, temporarily disrupting service. 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-20190703-cucm-dos

Credit

This vulnerability was found during the resolution(a Cisco TAC support case)

Affected Software

1 affected componentFixes available
Cisco Unified Communications Manager Major=12.5, <Apply patch file ciscocm.V12-5-1-10000-22_CSCvo70834_C0003-1.cop.sgn or upgrade to 12.5(1)SU1, =12.0, <Apply patch file ciscocm.V12-0-1-22900-11_CSCvo70834_C0003-1.cop.sgn or upgrade to 12.0(1)SU3, =11.5, <Apply patch file ciscocm.V11-5-1-SU5-SU6_CSCvo70834_C0003-1.cop.sgn, =10.5(2), <Apply patch file ciscocm.V10-5-2-SU7-SU8_CSCvo70834_C0003-1.cop.sgn, =Prior to 10.5(2), <Migrate to 10.5(2) and apply patch file ciscocm.V10-5-2-SU7-SU8_CSCvo70834_C0003-1.cop.sgn
Apply patch file ciscocm.V12-5-1-10000-22_CSCvo70834_C0003-1.cop.sgn or upgrade to 12.5(1)SU1Apply patch file ciscocm.V12-0-1-22900-11_CSCvo70834_C0003-1.cop.sgn or upgrade to 12.0(1)SU3Apply patch file ciscocm.V11-5-1-SU5-SU6_CSCvo70834_C0003-1.cop.sgnApply patch file ciscocm.V10-5-2-SU7-SU8_CSCvo70834_C0003-1.cop.sgnMigrate to 10.5(2) and apply patch file ciscocm.V10-5-2-SU7-SU8_CSCvo70834_C0003-1.cop.sgn

Event History

Jul 3, 2019
Advisory Published
via Cisco·04:00 PM

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of cisco-sa-20190703-cucm-dos?

The severity of cisco-sa-20190703-cucm-dos is classified as high due to its potential to cause a denial of service condition.

2

How do I fix cisco-sa-20190703-cucm-dos?

To fix cisco-sa-20190703-cucm-dos, apply the appropriate patch file or upgrade to the specified software versions mentioned in the advisory.

3

Which products are affected by cisco-sa-20190703-cucm-dos?

cisco-sa-20190703-cucm-dos affects various versions of Cisco Unified Communications Manager and Unified Communications Manager Session Management Edition.

4

Can cisco-sa-20190703-cucm-dos be exploited remotely?

Yes, cisco-sa-20190703-cucm-dos can be exploited by unauthenticated remote attackers.

5

Is there a workaround for cisco-sa-20190703-cucm-dos?

There is no specific workaround for cisco-sa-20190703-cucm-dos; updating to the fixed versions is recommended.

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