Description
A vulnerability in the Session Initiation Protocol (SIP) protocol implementation of Cisco Unified Communications Manager 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. A successful exploit could allow the attacker to trigger a new registration process on all connected phones, temporarily disrupting service.
References (1)
Core 1
Core References
Patch, Vendor Advisory vendor-advisory
x_refsource_cisco
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-cucm-dos
Scores
CVSS v3
8.6
EPSS
0.0177
EPSS Percentile
75.6%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-787
Status
published
Products (4)
cisco/unified_communications_manager
10.5\(2.10000.5\)
cisco/unified_communications_manager
11.5\(1.10000.6\)
cisco/unified_communications_manager
12.0\(1.10000.10\)
cisco/unified_communications_manager
12.5\(1.10000.22\)
Published
Jul 06, 2019
Tracked Since
Feb 18, 2026