HTTP response splitting in Cisco AsyncOS for Web Security Appliances and Cisco Content Security Management Appliance - CVE-2020-3117
Published: January 27, 2020
Vulnerability identifier: #VU24673
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-3117
CWE-ID: CWE-113
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco AsyncOS for Web Security Appliances
Cisco Content Security Management Appliance
Cisco AsyncOS for Web Security Appliances
Cisco Content Security Management Appliance
Detailed vulnerability description
The vulnerability allows a remote attacker to perform HTTP splitting attacks.
The vulnerability exists due to insufficient validation of user input in the API Framework. A remote attacker can trick a victim to access a crafted URL, receive a malicious HTTP response and inject arbitrary HTTP headers into valid HTTP responses sent to a user's browser.
How to mitigate CVE-2020-3117
Install updates from vendor's website.