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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWdxNjctcHA5dy00M2dw

Cryptographically weak CSRF tokens in Apache MyFaces

In the default configuration, Apache MyFaces Core versions 2.2.0 to 2.2.13, 2.3.0 to 2.3.7, 2.3-next-M1 to 2.3-next-M4, and 3.0.0-RC1 use cryptographically weak implicit and explicit cross-site request forgery (CSRF) tokens. Due to that limitation, it is possible (although difficult) for an attacker to calculate a future CSRF token value and to use that value to trick a user into executing unwanted actions on an application.

Mitigation: Existing web.xml configuration parameters can be used to direct MyFaces to use SecureRandom for CSRF token generation:

org.apache.myfaces.RANDOM_KEY_IN_VIEW_STATE_SESSION_TOKEN=secureRandom org.apache.myfaces.RANDOM_KEY_IN_CSRF_SESSION_TOKEN=secureRandom org.apache.myfaces.RANDOM_KEY_IN_WEBSOCKET_SESSION_TOKEN=secureRandom

Permalink: https://github.com/advisories/GHSA-gq67-pp9w-43gp
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWdxNjctcHA5dy00M2dw
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: almost 2 years ago
Updated: 4 months ago

Identifiers: GHSA-gq67-pp9w-43gp, CVE-2021-26296
References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-26296
• https://github.com/apache/myfaces/commit/cc6e1cc7b9aa17e52452f7f2657b3af9c421b2b2
• https://issues.apache.org/jira/browse/MYFACES-4373
• https://lists.apache.org/thread.html/r2b73e2356c6155e9ec78fdd8f72a4fac12f3e588014f5f535106ed9b%40%3Cannounce.apache.org%3E
• http://packetstormsecurity.com/files/161484/Apache-MyFaces-2.x-Cross-Site-Request-Forgery.html
• http://seclists.org/fulldisclosure/2021/Feb/66
• https://security.netapp.com/advisory/ntap-20210528-0007/
• https://github.com/advisories/GHSA-gq67-pp9w-43gp

Affected Packages