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A vulnerability in the web framework code of Cisco IOS and Cisco IOS XE Software could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web interface of the affected software using the banner parameter. The vulnerability is due to insufficient input validation of the banner parameter that are passed to the web server of the affected software. An attacker could exploit this vulnerability crafting a banner parameter and saving it. The attacker could then convince a user of the web interface to access a malicious link or could intercept a user request for the affected web interface and inject malicious code into the request. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected web interface or allow the attacker to access sensitive browser-based information. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-sbxss
Requires an admin to configure specific a banner parameter that is subject to XSS and assigned to the HTTP Server: ip http banner banner login To determine whether a release is affected by any published Cisco Security Advisory, use the Cisco IOS Software Checker on Cisco.com at the following link: https://tools.cisco.com/security/center/softwarechecker.x Affects the following Cisco IOS Trains: 15.2(2)E 15.2(3)E 15.2(4)E 15.2(5)E 15.2(6)E 15.2(7)E 15.2(2)EA 15.2(3)EA 15.2(4)EA 15.2(4)EC 15.2(5)EA 15.2(5)EX Affects the following Cisco IOS XE Trains: 3.6E 3.7E 3.8E 3.9E 3.10E 16.x First Fixed in: 16.3.8 16.6.5 16.8.2 16.9.2 16.10.1 and later
No workarounds available.
Please refer to the Security Advisory.
The Cisco PSIRT has assigned this bug the following CVSS version 3 score. The Base CVSS score as of the time of evaluation is 5.5: https://tools.cisco.com/security/center/cvssCalculator.x?version=3.0&vector=CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N CVE ID CVE-2019-12668 has been assigned to document this issue. Additional information on Cisco''s security vulnerability policy can be found at the following URL: http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html