#VU51969 Cross-site scripting in Cisco Systems, Inc products - CVE-2021-1380

Vulnerability identifier: #VU51969

Vulnerability risk: Low

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

CVE-ID: CVE-2021-1380

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Unified Communications Manager (CallManager)
Server applications / Remote management servers, RDP, SSH
Cisco Unified Communications Manager Session Management Edition
Server applications / Remote management servers, RDP, SSH
Cisco Unity Connection
Client/Desktop applications / Messaging software
Cisco Unified Communications Manager IM & Presence Service
Client/Desktop applications / Other client software

Vendor: Cisco Systems, Inc

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data in the web-based management interface. 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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Unified Communications Manager (CallManager): before 14.0.1.11000.1

Cisco Unified Communications Manager Session Management Edition: before 14.0.1.11900.3

Cisco Unity Connection: before 14.0

Cisco Unified Communications Manager IM & Presence Service: before 14.0.0.95200.4

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-xss-Q4PZcNzJ
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu52262
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv35159

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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.