SB2018040411 - Security restrcitions bypass in OpenResty
Published: April 4, 2018
Security Bulletin ID
SB2018040411
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper input validation (CVE-ID: CVE-2018-9230)
The 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.
Remediation
Install update from vendor's website.