CVE-2010-20112

CRITICAL

Amlib's NetOpacs webquery.dll - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2010-20112. PoCs published by Metasploit, aushack, including Metasploit module exploits/windows/http/amlibweb_webquerydll_app.

AI-analyzed exploit summary This Metasploit module exploits a stack buffer overflow in Amlibweb's webquery.dll via an overly long 'app' parameter in an IIS request, allowing remote code execution by overwriting SEH. It targets Windows 2000 Pro with a specific return address in ws2help.dll.

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

Exploits (2)

exploitdb WORKING POC VERIFIED
by Metasploit · rubyremotewindows
https://www.exploit-db.com/exploits/16793

This Metasploit module exploits a stack buffer overflow in Amlibweb's webquery.dll via an overly long 'app' parameter in an IIS request, allowing remote code execution by overwriting SEH. It targets Windows 2000 Pro with a specific return address in ws2help.dll.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Amlibweb Library Management System (NetOpacs) webquery.dll
No auth needed
Prerequisites: Target running Amlibweb with vulnerable webquery.dll · Access to TCP port 80
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC NORMAL
by aushack · rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/amlibweb_webquerydll_app.rb

This Metasploit module exploits a stack buffer overflow in Amlibweb's webquery.dll via an overly long 'app' parameter, allowing arbitrary remote code execution by overwriting SEH. It targets Windows 2000 Pro with a specific return address in ws2help.dll.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Amlibweb Library Management System (NetOpacs) webquery.dll
No auth needed
Prerequisites: Network access to the target system · IIS with Amlibweb webquery.dll exposed
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v4 9.3
EPSS 0.0105
EPSS Percentile 59.6%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-121
Status published
Products (1)
Amlib/Amlibweb Library Management System
Published Aug 21, 2025
Tracked Since Feb 18, 2026