CVE-2018-9230
high-risk
Published 2018-04-02
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
Do I need to act?
!
42.7% chance of exploitation in next 30 days
EPSS score — higher than 57% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
+
Fix available
Upgrade to: d2618c31355a2f7e7ac88ab845a72f61c3505f8b
9
CVSS 9.8/10
Critical
NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
References (4)
Vendor Advisory
https://openresty.org/en/changelog-1013006.html
Vendor Advisory
https://openresty.org/en/changelog-1013006.html
54
/ 100
high-risk
Severity
32/34 · Critical
Exploitability
17/34 · Moderate
Exposure
5/34 · Minimal