CVE-2023-50708 yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation
Attackers can exploit timing side-channels in OAuth and OpenID Connect state/nonce validation to bypass security checks in the Yii2 authentication extension.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-50708?
CVE-2023-50708 is a medium-severity vulnerability in yiisoft yii2-authclient, published on 22 Dec 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-203
Which versions are affected by CVE-2023-50708?
2 open source packages ship an affected version, including yiisoft/yii2-authclient. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
yiisoft/yii2-authclient Packagist | All versions | 2.2.15 |
yiisoft/yii2-authclient Packagist | All versions | 2.2.15 |
Products include Yiiframework Yii2-Authclient.
How do I fix CVE-2023-50708?
Upgrade yiisoft/yii2-authclient to 2.2.15 or later.
Is CVE-2023-50708 being exploited?
There is no known exploitation of CVE-2023-50708 in the wild and no public exploit code.
Other vulnerabilities in yiisoft yii2-authclient
Sources
Also known as GHSA-w8vh-p74j-x9xp.