CVE-2002-1609 in Tru64 UNIX
Summary
by MITRE
Buffer overflow in binmail in HP Tru64 UNIX 5.1a, 5.1, 5.0a, 4.0g, and 4.0f allows local users to gain privileges.
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Analysis
by VulDB Data Team • 11/18/2024
The vulnerability identified as CVE-2002-1609 represents a critical buffer overflow flaw within the binmail utility of HP Tru64 UNIX operating systems across multiple versions including 5.1a, 5.1, 5.0a, 4.0g, and 4.0f. This issue resides in the handling of user input within the binmail program, which serves as a mail delivery agent responsible for processing and delivering electronic messages to local user accounts. The buffer overflow condition occurs when the program processes command line arguments or input data without proper bounds checking, allowing malicious input to overwrite adjacent memory locations beyond the allocated buffer space.
The technical nature of this vulnerability stems from inadequate input validation mechanisms within the binmail utility implementation. When local users execute the program with specially crafted arguments or input parameters, the program fails to properly validate the length of input data before copying it into fixed-size buffers. This classic buffer overflow condition creates opportunities for attackers to overwrite critical memory segments including return addresses, function pointers, or other control data structures. The vulnerability is particularly dangerous because it operates within a privileged context, as binmail typically runs with elevated privileges necessary for mail delivery operations. This privilege escalation capability allows local attackers to potentially execute arbitrary code with higher system privileges than their original user account.
From an operational impact perspective, this vulnerability presents significant security risks for systems running affected HP Tru64 UNIX versions. Local users who can execute the binmail utility can exploit this flaw to gain elevated privileges, potentially leading to complete system compromise. The attack vector is relatively straightforward as it requires only local system access and knowledge of the vulnerable program's behavior. This vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and represents a classic example of how insufficient input validation can lead to privilege escalation. The attack surface is limited to systems where local users have access to execute the binmail utility, but this access may be readily available through normal system usage patterns or through other compromised accounts.
The security implications extend beyond simple privilege escalation to encompass potential system-wide compromise and data integrity violations. Attackers exploiting this vulnerability could potentially modify system files, install backdoors, or gain access to sensitive information stored in user mailboxes or system configurations. The vulnerability also demonstrates weaknesses in the overall security posture of legacy systems, as it reflects a common programming error that should have been addressed through proper input validation and secure coding practices. Organizations running affected systems should implement immediate mitigations including applying vendor patches, restricting local user access to the binmail utility, or implementing additional access controls. This vulnerability also highlights the importance of regular security assessments and vulnerability management programs, particularly for legacy operating systems that may not receive ongoing security updates. The ATT&CK framework categorizes this type of vulnerability under privilege escalation techniques, specifically targeting local account access and system binary exploitation methods that leverage software vulnerabilities to gain elevated system privileges.