CVE-2018-9230 Security feature bypass in n/a
Attackers can bypass Web Application Firewall protections by sending more than 100 URI parameters, which OpenResty ignores by default.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-9230?
CVE-2018-9230 is a critical vulnerability in n/a, published on 2 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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
Weakness: CWE-89
Which versions are affected by CVE-2018-9230?
It affects 1 product.
Products include Openresty Openresty.
How do I fix CVE-2018-9230?
No fix has been published for CVE-2018-9230 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-9230 being exploited?
There is no known exploitation of CVE-2018-9230 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-fgf7-9g3w-445r.