Security restrictions bypass in Cisco Unity Connection

1) Security restrictions bypass

EUVDB-ID: #VU10684

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0203

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists in the SMTP relay of Cisco Unity Connection due to improper handling of domain information. A remote attacker can send specially crafted requests to the targeted application, bypass security restrictions and send email messages to arbitrary addresses.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco Unity Connection: 11.5.1.999

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180221-cuc

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.