CVE-2011-4187 in iPrint
Summary
by MITRE
Buffer overflow in the GetDriverSettings function in nipplib.dll in Novell iPrint Client before 5.78 on Windows allows remote attackers to execute arbitrary code via a long realm field, a different vulnerability than CVE-2011-3173.
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Analysis
by VulDB Data Team • 11/30/2021
The vulnerability identified as CVE-2011-4187 represents a critical buffer overflow flaw within the Novell iPrint Client software ecosystem, specifically affecting versions prior to 5.78 on Windows operating systems. This vulnerability resides in the nipplib.dll library and manifests within the GetDriverSettings function, creating a pathway for remote code execution through crafted input manipulation. The flaw demonstrates characteristics consistent with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations, potentially leading to arbitrary code execution.
The technical exploitation of this vulnerability occurs when a remote attacker crafts a maliciously long realm field value that exceeds the allocated buffer space within the GetDriverSettings function. This buffer overflow condition enables attackers to overwrite critical memory segments including return addresses and function pointers, effectively allowing them to redirect program execution flow to malicious code payloads. The vulnerability differs from CVE-2011-3173, indicating that while both issues involve iPrint Client components, they affect different functions and require distinct exploitation techniques. This distinction highlights the complexity of the iPrint Client attack surface and the need for comprehensive security assessments of software libraries.
Operationally, this vulnerability presents significant risk to organizations utilizing Novell iPrint Client software, as it allows remote attackers to execute arbitrary code on targeted systems without requiring authentication. The impact extends beyond individual system compromise to potentially enable lateral movement within networks where iPrint clients are deployed. Attackers could leverage this vulnerability to establish persistent access, escalate privileges, or deploy additional malware components. The Windows environment provides additional attack vectors since the vulnerability affects the client-side application rather than server components, making it particularly concerning for enterprise environments where client software management is complex.
Mitigation strategies should prioritize immediate patch deployment to version 5.78 or later of the Novell iPrint Client software, as this represents the official fix for the identified buffer overflow vulnerability. Organizations should also implement network segmentation and access controls to limit exposure of iPrint client installations to untrusted networks. Additional defensive measures include monitoring network traffic for suspicious realm field values and implementing application whitelisting policies that restrict execution of unauthorized code. Security teams should consider the ATT&CK framework's T1059.007 technique for command and scripting interpreter execution, as this vulnerability could enable attackers to execute malicious commands through compromised iPrint client processes. Regular vulnerability assessments and penetration testing should be conducted to identify similar buffer overflow conditions in other client applications and ensure comprehensive protection against similar exploitation vectors.