Vulnerability · Published Dec 22, 2023 · Assigned by GitHub_M
CVE-2023-50714The Oauth2 PKCE implementation is vulnerable
Medium 6.8
In plain English
A medium-severity server-side request forgery in yii2-authclient from yiisoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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 Oauth2 PKCE implementation is vulnerable in 2 ways. First, the `authCodeVerifier` should be removed after usage (similar to `authState`). Second, there is a risk for a `downgrade attack` if PKCE is being relied on for CSRF protection. Version 2.2.15 contains a patch for the issue. No known workarounds are available.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | yiisoft/yii2-authclient | 2.2.15 | GHSA-rw54-6826-c8j5 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| yiisoft | yii2-authclient | < 2.2.15 |
Weakness: CWE-918, CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
References
- https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-rw54-6826-c8j5 x_refsource_CONFIRM
- https://github.com/yiisoft/yii2-authclient/commit/721ed974bc44137437b0cdc8454e137fff8db213 x_refsource_MISC
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158 x_refsource_MISC
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121 x_refsource_MISC
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420 x_refsource_MISC