Multiple vulnerabilities in Cisco Unity Connection

Published: 2018-10-03

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-15396 CVE-2018-15426
CWE-ID	CWE-20 CWE-79
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Cisco Unity Connection Client/Desktop applications / Messaging software
Vendor	Cisco Systems, Inc

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU15218

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-15396

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to improper restriction of the maximum size of certain files that can be written to disk. A remote attacker who has valid administrator credentials for an affected system can send a specially crafted, remote connection request, write a file that consumes most of the available disk space on the system and cause application functions to operate abnormally and lead to a DoS condition.

Mitigation

The vulnerability has been fixed in the version 12.5(0.97000.301), 12.0(1.22900.7), 12.5(0.202), 12.0(1.53).

Vulnerable software versions

Cisco Unity Connection: 12.5

CPE2.3

cpe:2.3:a:cisco_systems:cisco_unity_connection:12.5:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-unity-dos

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Cross-site scripting

EUVDB-ID: #VU15219

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-15426

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote high-privileged attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.