Security restrcitions bypass in OpenResty
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2018-9230 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
OpenResty Server applications / Web servers |
| Vendor | OpenResty Inc. |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Improper input validation
EUVDB-ID: #VU11517
Risk: Low
CVSSv3.1: 6.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C]
CVE-ID: CVE-2018-9230
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to bypass security restrictions on the target system.
The weakness exists due to improper validation of URI parameter values when handling the ngx.req.get_uri_args and ngx.req.get_post_args functions with more than 100 parameters. A remote attacker can use GET and POST requests that contain more than 100 parameters in the affected functions, where malicious input is included in parameters after the first 100, trigger URI parameter overflow and bypass security restrictions.
Update to version 1.13.6.1.
Vulnerable software versionsOpenResty: 1.4.0 - 1.11.2.5
External linksQ & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
