GHSA-rw54-6826-c8j5: yiisoft/yii2-authclient's Oauth2 PKCE implementation is vulnerable

1. GitHub Advisory Database
2. GitHub Reviewed
3. CVE-2023-50714

yiisoft/yii2-authclient’s Oauth2 PKCE implementation is vulnerable

Moderate severity GitHub Reviewed Published Dec 16, 2023 in yiisoft/yii2-authclient • Updated Dec 18, 2023

Package

composer yiisoft/yii2-authclient (Composer)

Affected versions

< 2.2.15

Impact

What kind of vulnerability is it? Who is impacted?

Original Report:

The Oauth2 PKCE implementation is vulnerable in 2 ways:

1. The authCodeVerifier should be removed after usage (similar to ‘authState’)
2. There is a risk for a “downgrade attack” if PKCE is being relied on for CSRF protection.

Patches

Has the problem been patched? What versions should users upgrade to?

2.2.15

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

not known yet.

References

Are there any links users can visit to find out more?

References

• GHSA-rw54-6826-c8j5
• yiisoft/yii2-authclient@721ed97

Published to the GitHub Advisory Database

Dec 18, 2023

Last updated

Dec 18, 2023