Denial of service in Cisco Unified Customer Voice Portal

1) Resource exhaustion

EUVDB-ID: #VU10123

Risk: Low

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0086

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the application server of the Cisco Unified Customer Voice Portal (CVP) due to malformed SIP INVITE traffic received on the CVP during communications with the Cisco Virtualized Voice Browser (VVB). A remote attacker can send malformed SIP INVITE traffic to the targeted appliance trigger memory exhaustion and cause the system to crash.

Mitigation

Update to version 11.6(1).

Vulnerable software versions

Cisco Unified Customer Voice Portal: 10.5 - 11.5

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-cvp

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.