CVE-2018-9230

CRITICAL

OpenResty < 1.13.6.1 - Parameter Overflow Bypass via URI Parameter Handling

Title source: llm
STIX 2.1

Description

In OpenResty through 1.13.6.1, URI parameters are obtained using the ngx.req.get_uri_args and ngx.req.get_post_args functions that ignore parameters beyond the hundredth one, which might allow remote attackers to bypass intended access restrictions or interfere with certain Web Application Firewall (ngx_lua_waf or X-WAF) products. NOTE: the vendor has reported that 100 parameters is an intentional default setting, but is adjustable within the API. The vendor's position is that a security-relevant misuse of the API by a WAF product is a vulnerability in the WAF product, not a vulnerability in OpenResty

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.1368
EPSS Percentile 96.1%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-89
Status published
Products (1)
openresty/openresty < 1.13.6.1
Published Apr 02, 2018
Tracked Since Feb 18, 2026