#VU67206 Improper access control in Apache Shiro - CVE-2016-4437

Vulnerability identifier: #VU67206

Vulnerability risk: High

CVSSv4.0: 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/E:A/U:Amber]

CVE-ID: CVE-2016-4437

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Apache Shiro
Universal components / Libraries / Software for developers

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to execute arbitrary code or bypass intended access restrictions.

The vulnerability exists due to improper access restrictions when a cipher key is not been configured for the "remember me" feature. A remote attacker can bypass implemented security restrictions and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Shiro: 1.0.0 - 1.2.4

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External links
https://packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.html
https://packetstormsecurity.com/files/157497/Apache-Shiro-1.2.4-Remote-Code-Execution.html
https://rhn.redhat.com/errata/RHSA-2016-2035.html
https://rhn.redhat.com/errata/RHSA-2016-2036.html
https://www.securityfocus.com/archive/1/538570/100/0/threaded
https://www.securityfocus.com/bid/91024

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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?

Yes. This vulnerability is being exploited in the wild.