CRLF injection in Ivanti Connect Secure and Ivanti Policy Secure

1) CRLF injection

EUVDB-ID: #VU89721

Risk: Low

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-38551

CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Exploit availability: No

Description

The vulnerability allows a remote user to inject arbitrary data in server response.

The vulnerability exists due to insufficient validation of attacker-supplied data. A remote privileged user can pass specially crafted data to the application containing CR-LF characters and modify application behavior, leading to cross-site scripting attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ivanti Connect Secure (formerly Pulse Connect Secure): before 22.7R2

Ivanti Policy Secure (formerly Pulse Policy Secure): before 22.7R1

External links

http://forums.ivanti.com/s/article/Security-Advisory-May-2024?language=en_US
http://forums.ivanti.com/s/article/KB-Security-Advisory-Ivanti-Connect-Secure-Ivanti-Policy-Secure-May-2024?language=en_US

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.