CVE-2018-9230
CRITICALOpenResty < 1.13.6.1 - Parameter Overflow Bypass via URI Parameter Handling
Title source: llmDescription
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
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/Bypass007/vuln/blob/master/OpenResty/Uri%20parameter%20overflow%20in%20Openresty.md
Vendor Advisory x_refsource_misc
https://openresty.org/en/changelog-1013006.html
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