#VU53540 Improper Authentication in Apache Pulsar - CVE-2021-22160
Published: May 25, 2021
Vulnerability identifier: #VU53540
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-22160
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Apache Pulsar
Apache Pulsar
Software vendor:
Apache Foundation
Apache Foundation
Description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in when processing authentication requests based on JSON Web Tokens (JWT). The signature of the token is not validated if the algorithm of the presented token is set to "none". A remote attacker can bypass authentication process and connect under arbitrary account to the application, including administrative accounts.
Remediation
Install updates from vendor's website.