Main Vulnerability Database Vulnerabilities #VU50177

Improper Authentication in Apache Shiro - CVE-2020-17523

Published: February 1, 2021 / Updated: February 4, 2021

Vulnerability identifier: #VU50177

CSH Severity: High

CVSS v4: 9.3 [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]

CVE-ID: CVE-2020-17523

CWE-ID: CWE-287

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests in Apache Shiro with Spring. A remote attacker can send a specially crafted HTTP request to bypass authentication process and gain unauthorized access to the application.

Affected software

Apache Shiro
Planning Analytics Local

How to mitigate CVE-2020-17523

Install updates from vendor's website.

Apache Shiro - update to 1.7.1
Planning Analytics Local - update to 2.0.1

Links to Public Exploits and PoC-codes

Exploit #5114 - shiro-cve-2020-17523 (shiro-cve-2020-17523 漏洞的两种绕过姿势分析以及配套的漏洞环境) (February 4, 2021)

External References

http://seclists.org/oss-sec/2021/q1/94