CVE-2023-50708

Public Exploit
yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation

Description

yii2-authclient is an extension that adds OpenID, OAuth, OAuth2 and OpenId Connect consumers for the Yii framework 2.0. In yii2-authclient prior to version 2.2.15, the Oauth1/2 `state` and OpenID Connect `nonce` is vulnerable for a `timing attack` since it is compared via regular string comparison (instead of `Yii::$app->getSecurity()->compareString()`). Version 2.2.15 contains a patch for the issue. No known workarounds are available.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.16%
Third-Party Advisory github.com
Affected: yiisoft yii2-authclient
Published at:
Updated at:

References

Link Tags
https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-w8vh-p74j-x9xp patch third party advisory exploit
https://github.com/yiisoft/yii2-authclient/commit/dabddf2154ab7e7703740205a069202554089248 patch issue tracking
https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158 product
https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121 product
https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420 product

Frequently Asked Questions

What is the severity of CVE-2023-50708?
CVE-2023-50708 has been scored as a medium severity vulnerability.
How to fix CVE-2023-50708?
To fix CVE-2023-50708, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-50708 being actively exploited in the wild?
It is possible that CVE-2023-50708 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-50708?
CVE-2023-50708 affects yiisoft yii2-authclient.
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