SB2018022216 - Denial of service in Cisco Unified Customer Voice Portal
Published: February 22, 2018
Security Bulletin ID
SB2018022216
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper input validation (CVE-ID: CVE-2018-0139)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the Interactive Voice Response (IVR) management connection interface due to improper handling of a TCP connection request when the IVR connection is already established. A remote attacker can initiate a specially crafted connection to the IP address, disconnect the IVR to CVP connection and prevent the CVP from accepting new, incoming calls while the IVR automatically attempts to re-establish the connection to the CVP.
Remediation
Install update from vendor's website.