BIT-apisix-2022-24112

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BIT-apisix-2022-24112

Summary: apisix/batch-requests plugin allows overwriting the X-REAL-IP header

Details: An attacker can abuse the batch-requests plugin to send requests to bypass the IP restriction of Admin API. A default configuration of Apache APISIX (with default API key) is vulnerable to remote code execution. When the admin key was changed or the port of Admin API was changed to a port different from the data panel, the impact is lower. But there is still a risk to bypass the IP restriction of Apache APISIX's data panel. There is a check in the batch-requests plugin which overrides the client IP with its real remote IP. But due to a bug in the code, this check can be bypassed.

References: http://packetstormsecurity.com/files/166228/Apache-APISIX-Remote-Code-Execution.html, http://packetstormsecurity.com/files/166328/Apache-APISIX-2.12.1-Remote-Code-Execution.html, http://www.openwall.com/lists/oss-security/2022/02/11/3, https://lists.apache.org/thread/lcdqywz8zy94mdysk7p3gfdgn51jmt94, https://nvd.nist.gov/vuln/detail/CVE-2022-24112, https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-24112