#VU68970 HTTP response splitting in Cisco Secure Email and Web Manager and Cisco AsyncOS for Cisco Email Security Appliance - CVE-2022-20772

Vulnerability identifier: #VU68970

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-20772

CWE-ID: CWE-113

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Secure Email and Web Manager
Server applications / Other server solutions
Cisco AsyncOS for Cisco Email Security 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 software does not corrector process CRLF character sequences. A remote attacker can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Secure Email and Web Manager: before 14.2.0-217

Cisco AsyncOS for Cisco Email Security Appliance: before 14.0.3-015

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ESA-HTTP-Inject-nvsycUmR
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz24026
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa84908

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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.