Stack-based Buffer Overflow in Amlib's NetOpacs WebQuery DLL
CVE-2010-20112

9.3CRITICAL

Key Information:

Vendor

Amlib

Status
Amlibweb Library Management System
Vendor
CVE Published:
21 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2010-20112?

Amlib's NetOpacs webquery.dll is susceptible to a stack-based buffer overflow due to improper management of HTTP GET parameters. This flaw allows attackers to exploit the application by sending disproportionately large input to the app parameter, which can overwrite critical memory structures such as the Structured Exception Handler (SEH). Additionally, the vulnerability may be triggered by malformed parameter names followed by an equals sign, potentially redirecting control flow in unintended ways. This issue is prominent in legacy Windows environments and is accessible via IIS, posing significant risks to web applications utilizing this component.

Affected Version(s)

Amlibweb Library Management System *

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2010-20112 - Proof of Concept

CVE-2010-20112 - Proof of Concept

References

https://raw.githubusercontent.com/rapid7/metasploit-frame...
exploit
https://www.exploit-db.com/exploits/16793
exploit
https://www.fortiguard.com/encyclopedia/ips/24002
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

aushack
.
CVE-2010-20112 : Stack-based Buffer Overflow in Amlib's NetOpacs WebQuery DLL