#VU21351 Stored cross-site scripting in Cisco IOS XE and Cisco IOS - CVE-2019-12668
Published: September 26, 2019
Vulnerability identifier: #VU21351
Vulnerability risk: Low
CVSSv4.0: 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-2019-12668
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Cisco IOS XE
Cisco IOS
Cisco IOS XE
Cisco IOS
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists in the web framework code due to insufficient sanitization of user-supplied data in the "banner" parameter. A remote attacker can craft a banner parameter and save it, then inject 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.
Remediation
Install updates from vendor's website.