CVE-2018-8938 in Whatsup Gold
Summary
by MITRE
A Code Injection issue was discovered in DlgSelectMibFile.asp in Ipswitch WhatsUp Gold before 2018 (18.0). Malicious actors can inject a specially crafted SNMP MIB file that could allow them to execute arbitrary commands and code on the WhatsUp Gold server.
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Analysis
by VulDB Data Team • 08/27/2024
The vulnerability identified as CVE-2018-8938 represents a critical code injection flaw in Ipswitch WhatsUp Gold version 2018.0 and earlier, specifically within the DlgSelectMibFile.asp component. This issue arises from inadequate input validation and sanitization mechanisms that fail to properly filter user-supplied data when processing SNMP MIB files. The vulnerability exists in the web-based administration interface where users can select and import MIB files for network monitoring purposes, creating a pathway for remote code execution through maliciously crafted input.
The technical exploitation of this vulnerability occurs through the improper handling of SNMP MIB file inputs in the DlgSelectMibFile.asp script. When a user uploads or selects a malicious MIB file, the application fails to validate the file contents against a whitelist of acceptable characters and structures. This allows attackers to inject arbitrary code that gets executed within the context of the WhatsUp Gold server. The flaw essentially permits command injection attacks where malicious payloads can be embedded within MIB file structures, bypassing normal security controls and executing with the privileges of the web application. This vulnerability aligns with CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" and represents a classic example of how insufficient input validation can lead to remote code execution.
The operational impact of CVE-2018-8938 is severe and far-reaching for organizations using Ipswitch WhatsUp Gold. Successful exploitation provides attackers with full command execution capabilities on the affected server, potentially enabling them to install backdoors, exfiltrate sensitive network data, modify monitoring configurations, or use the compromised system as a pivot point for attacking other network resources. Given that WhatsUp Gold is designed for network infrastructure monitoring, the compromise of such a system can lead to complete visibility into network operations and potentially expose critical infrastructure assets. The vulnerability affects organizations that rely on network monitoring tools for security operations, making it particularly dangerous in enterprise environments where these systems often run with elevated privileges and have access to sensitive network information.
Organizations should implement immediate mitigations including updating to Ipswitch WhatsUp Gold version 2018.0 or later, which contains the necessary patches for this vulnerability. Network segmentation should be employed to limit access to the WhatsUp Gold administration interface, and strict access controls should be implemented to restrict who can upload or modify MIB files. Additionally, implementing web application firewalls and input validation controls can help detect and prevent malicious MIB file uploads. The ATT&CK framework categorizes this vulnerability under T1059.001 for command and scripting interpreter and T1078 for valid accounts, as exploitation typically involves using legitimate administrative accounts to upload malicious files and execute commands. Regular security assessments and monitoring of file upload activities should be conducted to detect potential exploitation attempts, while also ensuring that all network monitoring tools maintain current security patches to prevent similar vulnerabilities from being exploited in the future.