#VU50852 Cross-site request forgery in MyFaces Core - CVE-2021-26296

Vulnerability identifier: #VU50852

Vulnerability risk: Medium

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-26296

CWE-ID: CWE-352

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
MyFaces Core
Web applications / Other software

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient CSRF protection mechanism. A remote attacker can guess the CSRF token, trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MyFaces Core: 2.0.13 - 3.0.0 RC1

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External links
https://packetstormsecurity.com/files/161484/Apache-MyFaces-2.x-Cross-Site-Request-Forgery.html
https://seclists.org/fulldisclosure/2021/Feb/66
https://lists.apache.org/thread.html/r2b73e2356c6155e9ec78fdd8f72a4fac12f3e588014f5f535106ed9b%40%3Cannounce.apache.org%3E
https://seclists.org/fulldisclosure/2021/Feb/66

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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. However, proof of concept for this vulnerability is available.