CVE-2000-0407 in Solaris
Summary
by MITRE
Buffer overflow in Solaris netpr program allows local users to execute arbitrary commands via a long -p option.
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Analysis
by VulDB Data Team • 01/18/2025
The vulnerability described in CVE-2000-0407 represents a classic buffer overflow flaw within the Solaris netpr program that exposes a critical security weakness in Unix-based operating systems. This issue specifically affects the network printing utility that handles print job processing and communication within Solaris environments. The netpr program serves as a component in the print spooling system, managing how print requests are processed and transmitted to network printers. When local users exploit this vulnerability through a malformed -p option parameter, they can manipulate memory allocation patterns to execute arbitrary code with elevated privileges.
The technical implementation of this buffer overflow stems from improper input validation within the netpr program's argument parsing mechanism. When the program processes command-line arguments, particularly the -p option used for specifying printer names or print queues, it fails to properly bounds-check the input length. This lack of input sanitization creates a scenario where an attacker can supply an excessively long string that overflows the allocated buffer space, potentially overwriting adjacent memory locations including return addresses and program control structures. The vulnerability is classified as a local privilege escalation issue since it requires local system access but can be leveraged to gain elevated privileges.
The operational impact of this vulnerability extends beyond simple code execution, as it fundamentally compromises the integrity and confidentiality of the affected Solaris system. Local users who exploit this flaw can execute arbitrary commands with the privileges of the netpr process, which typically runs with elevated permissions to manage print operations. This creates a potential pathway for attackers to establish persistent access, escalate privileges further, or manipulate print job processing to redirect sensitive information. The vulnerability's local nature means that exploitation does not require network access, making it particularly concerning for systems where local user access is not strictly controlled.
Mitigation strategies for this vulnerability should focus on immediate patching and system hardening measures. Solaris administrators should apply the appropriate security patches released by Sun Microsystems to address the buffer overflow in the netpr program. Additionally, implementing proper input validation and bounds checking in all system utilities can prevent similar issues from occurring in the future. System administrators should also consider implementing privilege separation mechanisms and limiting local user access to critical system utilities. From a security framework perspective, this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and maps to ATT&CK technique T1068, which covers local privilege escalation through exploitation of system vulnerabilities. Organizations should also consider deploying intrusion detection systems to monitor for suspicious command-line arguments and unusual print job processing patterns that might indicate exploitation attempts.