Description
Amlib’s NetOpacs webquery.dll contains a stack-based buffer overflow vulnerability triggered by improper handling of HTTP GET parameters. Specifically, the application fails to enforce bounds on input supplied to the app parameter, allowing excessive data to overwrite memory structures including the Structured Exception Handler (SEH). Additionally, malformed parameter names followed by an equals sign may result in unintended control flow behavior. This vulnerability is exposed through IIS and affects legacy Windows deployments
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality (Vulnerable System)
High
Integrity (Vulnerable System)
High
Availability (Vulnerable System)
High
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
Affected products
References
- EXPLOIThttps://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/amlibweb_webquerydll_app.rb
- EXPLOIThttps://www.exploit-db.com/exploits/16793
- MISChttps://www.fortiguard.com/encyclopedia/ips/24002
- VENDOR_ADVISORYhttps://advisories.checkpoint.com/defense/advisories/public/2013/cpai-2013-1344.html
- MISChttps://www.amlib.co.uk/product/product.aspx?menuId=top_products
- VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/amlibweb-netopacs-stack-buffer-overflow