CVE-2002-0033 in Solaris
Summary
by MITRE
Heap-based buffer overflow in cfsd_calloc function of Solaris cachefsd allows remote attackers to execute arbitrary code via a request with a long directory and cache name.
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Analysis
by VulDB Data Team • 01/21/2025
The vulnerability identified as CVE-2002-0033 represents a critical heap-based buffer overflow affecting the Solaris cachefsd service. This flaw exists within the cfsd_calloc function which handles memory allocation for directory and cache name processing. The vulnerability arises from insufficient input validation when processing network requests containing excessively long directory and cache names, creating a condition where attacker-controlled data can overwrite adjacent heap memory regions. Such buffer overflow conditions are classified under CWE-121 as heap-based buffer overflow, representing a fundamental memory safety issue that has been a persistent concern in system software development.
The technical exploitation of this vulnerability occurs through remote network requests sent to the Solaris cachefsd service. When a maliciously crafted request contains an abnormally long directory and cache name, the cfsd_calloc function fails to properly bounds-check the input data before copying it into fixed-size heap buffers. This allows attackers to overwrite adjacent memory locations, potentially corrupting program execution flow and enabling arbitrary code execution. The vulnerability specifically affects the Solaris operating system's caching file system service, which is designed to provide transparent caching of files across networked systems.
The operational impact of this vulnerability is severe as it provides remote attackers with the capability to execute arbitrary code with the privileges of the cachefsd process. This typically means the attacker can gain elevated system access and potentially compromise the entire system. The vulnerability affects systems running Solaris versions that include the affected cachefsd service, creating a significant risk for networked environments where this service is enabled. The exploitability of this vulnerability is enhanced by the fact that it requires no local access and can be triggered through network communication, making it particularly dangerous in exposed network environments.
Mitigation strategies for CVE-2002-0033 should focus on immediate patch application from Oracle, which would address the buffer overflow through proper input validation and bounds checking in the cfsd_calloc function. System administrators should disable the cachefsd service if it is not required for operations, as this eliminates the attack surface entirely. Network segmentation and firewall rules should be implemented to restrict access to the affected service ports, limiting potential exploitation. Additionally, monitoring for unusual network traffic patterns and implementing intrusion detection systems can help identify exploitation attempts. This vulnerability aligns with ATT&CK technique T1059.007 for command and script injection through remote code execution, making it a significant concern for enterprise security postures. The remediation approach should also include regular security assessments and vulnerability scanning to identify similar memory safety issues in other system components.