Vulnerability identifier: #VU24673

Vulnerability risk: Medium

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3117

CWE-ID: CWE-113

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco AsyncOS for Web Security Appliances
Server applications / IDS/IPS systems, Firewalls and proxy servers
Cisco Content Security Management Appliance
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Cisco Systems, Inc

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco AsyncOS for Web Security Appliances: All versions

Cisco Content Security Management Appliance: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-wsa-sma-header-inject

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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.