#VU83504 Inefficient regular expression complexity in Puppet Server and Puppet Enterprise - CVE-2023-1894

Vulnerability identifier: #VU83504

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-1894

CWE-ID: CWE-1333

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Puppet Server
Server applications / Conferencing, Collaboration and VoIP solutions
Puppet Enterprise
Client/Desktop applications / Software for system administration

Vendor: Puppet Labs

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing untrusted input with a regular expressions. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

Vulnerable software versions

Puppet Server: 7.0.0 - 7.10.0

Puppet Enterprise: 2021.1.0 - 2023.0.0

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External links
https://www.puppet.com/security/cve/cve-2023-1894-puppet-server-redos

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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.