CVE-2002-0012 in Host
Summary
by MITRE
Vulnerabilities in a large number of SNMP implementations allow remote attackers to cause a denial of service or gain privileges via SNMPv1 trap handling, as demonstrated by the PROTOS c06-SNMPv1 test suite. NOTE: It is highly likely that this candidate will be SPLIT into multiple candidates, one or more for each vendor. This and other SNMP-related candidates will be updated when more accurate information is available.
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Analysis
by VulDB Data Team • 12/30/2024
The vulnerability described in CVE-2002-0012 represents a critical weakness in SNMPv1 trap handling mechanisms that affects numerous network management implementations across various vendors. This issue stems from fundamental design flaws in how SNMP versions 1 and 2 trap packets are processed, creating opportunities for malicious actors to exploit the protocol's inherent weaknesses. The vulnerability specifically targets the trap handling functionality within SNMP implementations, which serves as a crucial communication mechanism for network devices to report events and status changes to management systems. The PROTOS c06-SNMPv1 test suite demonstrated how this weakness could be systematically exploited to either cause denial of service conditions or potentially escalate privileges within affected systems. The widespread nature of this vulnerability across multiple vendors indicates a fundamental flaw in the SNMP protocol implementation rather than isolated vendor-specific issues. This weakness directly relates to CWE-121, which addresses buffer overflow conditions in network protocol handling, and CWE-122, concerning buffer overflow vulnerabilities in network services. The vulnerability's impact extends beyond simple denial of service scenarios, as it could potentially allow attackers to execute arbitrary code or gain elevated privileges within network management systems.
The technical exploitation of this vulnerability occurs through malformed SNMP trap packets that trigger buffer overflows or other memory corruption conditions within the receiving SNMP implementation. Attackers can craft specific trap messages that cause the receiving system to process data in ways that exceed allocated memory boundaries or corrupt critical system structures. When SNMP trap handlers do not properly validate input parameters or enforce proper buffer limits, they become susceptible to exploitation through carefully constructed malicious trap packets. The vulnerability manifests particularly in implementations that fail to properly sanitize or validate the contents of SNMP trap messages, especially in the variable binding sections where additional data is transmitted. This type of exploitation aligns with ATT&CK technique T1071.004, which describes protocol manipulation and exploitation of network protocols for privilege escalation. The attack vectors typically involve sending specially crafted trap packets to management stations or network devices that are configured to receive SNMP traps, causing the vulnerable software to crash or behave unpredictably. The memory corruption effects can result in system crashes, restarts, or in some cases, provide opportunities for attackers to execute code with elevated privileges. The vulnerability's persistence across multiple vendors suggests that the underlying implementation patterns and coding practices were common throughout the SNMP ecosystem, making this an industry-wide concern rather than an isolated incident.
The operational impact of CVE-2002-0012 extends significantly beyond simple network disruption, as SNMP trap handling is fundamental to network monitoring and management operations. When exploited, this vulnerability can cause complete network management system outages, leaving organizations unable to monitor their network infrastructure effectively. The potential for privilege escalation means that attackers could gain administrative access to network management systems, potentially compromising entire network infrastructures. Organizations relying on SNMP-based monitoring and alerting systems face critical operational risks when this vulnerability exists in their environments. The vulnerability's exploitation can occur without authentication, making it particularly dangerous as attackers can target systems passively without requiring valid credentials. This characteristic aligns with ATT&CK technique T1071.004, which covers protocol manipulation and exploitation of network protocols for privilege escalation and lateral movement. The widespread nature of affected implementations means that organizations often face cascading failures when a single vulnerable component is exploited, as SNMP trap handling is integrated into many network management workflows. The vulnerability's impact is further compounded by the fact that many network administrators may not immediately detect exploitation attempts, as the system behavior might appear as normal network failures or intermittent issues.
Mitigation strategies for CVE-2002-0012 require immediate implementation of multiple layers of protection to address both the immediate vulnerability and prevent exploitation. Organizations should prioritize upgrading to SNMPv3 implementations, which provide enhanced security features including authentication and encryption that are not available in SNMPv1. The transition to SNMPv3 eliminates the specific vulnerability conditions that enable the exploit, as the newer protocol version addresses the fundamental design flaws in trap handling. Network segmentation and access control measures should be implemented to restrict SNMP trap reception to trusted management systems only, reducing the attack surface for exploitation. Implementing proper input validation and bounds checking on SNMP trap handlers can provide additional protection against buffer overflow conditions. Regular network monitoring should be established to detect unusual trap traffic patterns that might indicate exploitation attempts. Organizations should also consider implementing network intrusion detection systems specifically configured to identify and alert on suspicious SNMP trap packets. The remediation process must include comprehensive testing of updated implementations to ensure that the security patches do not introduce compatibility issues with existing network management systems. Additionally, organizations should conduct thorough vulnerability assessments to identify all systems that may be vulnerable to similar SNMP-related issues, as the underlying design flaws in SNMPv1 trap handling were widespread across the industry. The vulnerability's classification as potentially requiring multiple CVE assignments reflects the need for granular tracking of specific vendor implementations, ensuring that each affected system receives appropriate attention and remediation.