yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation
Impact
What kind of vulnerability is it? Who is impacted?
Original Report:
The Oauth1/2 "state" and OpenID Connect "nonce" is vulnerable for a "timing attack" since it's compared via regular string comparison (instead of
Yii::$app->getSecurity()->compareString()).
Affected Code:
-
OAuth 1 "state"
-
OAuth 2 "state"
-
OpenID Connect "nonce"
Patches
Has the problem been patched? What versions should users upgrade to?
TBD: Replace strcmp with Yii::$app->getSecurity()->compareString()).
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
not as far as I see.
References
Are there any links users can visit to find out more?
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | yiisoft/yii2-authclient | < 2.2.15 | 2.2.15 |
References
- https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-w8vh-p74j-x9xp
- https://nvd.nist.gov/vuln/detail/CVE-2023-50708
- https://github.com/yiisoft/yii2-authclient/commit/dabddf2154ab7e7703740205a069202554089248
- https://github.com/yiisoft/yii2-authclient
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:N- Weakness (CWE)
CWE-203- Platform
- Composer
- Package
yiisoft/yii2-authclient- Disclosed
- 18.12.2023
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-w8vh-p74j-x9xp - CC BY 4.0
Vulnerability history: yiisoft/yii2-authclient
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 12.2023 12.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 1
- Low 1
Disclosures per year
- 2023: 2
- 2024: 0
- 2025: 0
- 2026: 0
-
yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation this entry
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