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Date: Wed, 20 Apr 2022 03:40:37 +0000
From: Zeping Bai <bzp2010@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2022-29266: Apache APISIX: apisix/jwt-auth may leak secrets in
error response
Severity: critical
Description:
An attacker can obtain a plugin-configured secret via an error message response by sending an incorrect JSON Web Token to a route protected by the jwt-auth plugin.
The error logic in the dependency library lua-resty-jwt enables sending an RS256 token to an endpoint that requires an HS256 token, with the original secret value included in the error response.
Mitigation:
1. Upgrade to 2.13.1 and above
2. Apply the following patch to Apache APISIX and rebuild it:
This will make this error message no longer contain sensitive information and return a fixed error message to the caller.
For the current LTS 2.13.x or master:
https://github.com/apache/apisix/pull/6846
https://github.com/apache/apisix/pull/6847
https://github.com/apache/apisix/pull/6858
For the last LTS 2.10.x:
https://github.com/apache/apisix/pull/6847
https://github.com/apache/apisix/pull/6855
3. Manually modify the version you are using according to the commit above and rebuild it to circumvent the vulnerability.
Credit:
Discovered and reported by a team from Kingdee Software (China) Ltd. consisting of Zhongyuan Tang, Hongfeng Xie, and Bing Chen.
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