CVE-2000-0701 in Mailman
Summary
by MITRE
The wrapper program in mailman 2.0beta3 and 2.0beta4 does not properly cleanse untrusted format strings, which allows local users to gain privileges.
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Analysis
by VulDB Data Team • 05/27/2018
The vulnerability identified as CVE-2000-0701 resides within the mailman mailing list manager software version 2.0beta3 and 2.0beta4, specifically within its wrapper program component. This issue represents a critical security flaw that stems from inadequate input validation and sanitization of format strings, creating a pathway for privilege escalation attacks. The wrapper program serves as an intermediary component that processes various user inputs and system commands, making it a prime target for exploitation by malicious actors seeking to elevate their system access privileges.
The technical flaw manifests in the improper handling of untrusted format strings, which directly relates to CWE-134, a weakness category that encompasses format string vulnerabilities. When the wrapper program processes user-supplied data without adequate cleansing or validation, it becomes susceptible to format string attacks that can manipulate memory layout and execute arbitrary code. This vulnerability operates by exploiting the printf family of functions in C programming where format specifiers are not properly controlled, allowing attackers to inject malicious format specifiers that can read from or write to arbitrary memory locations. The flaw specifically impacts the privilege escalation mechanism within the mailman system, enabling local users to potentially execute commands with elevated privileges.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it represents a fundamental breakdown in the software's security architecture. Local users who can access the mailman wrapper program can leverage this weakness to execute arbitrary code on the system, potentially leading to complete system compromise. The attack vector requires local system access, which means that the vulnerability is particularly dangerous in multi-user environments where users may have legitimate access to the system but should not possess elevated privileges. This type of vulnerability falls under the ATT&CK framework's privilege escalation tactics, specifically targeting local privilege escalation techniques that exploit software flaws to gain higher system permissions.
Mitigation strategies for CVE-2000-0701 should focus on immediate software updates and code-level fixes. Organizations must upgrade to mailman versions that address this specific vulnerability, as the affected beta versions represent unstable releases with known security issues. The recommended approach involves implementing proper input validation and sanitization of all format string parameters within the wrapper program, ensuring that user-supplied data cannot be interpreted as format specifiers. System administrators should also consider implementing additional security controls such as restricted file permissions, mandatory access controls, and monitoring for unusual privilege escalation attempts. The vulnerability highlights the importance of thorough security testing during software development, particularly for components that handle user input and system commands. Given the age of the affected versions, organizations should also consider migrating to more recent mailman releases that have undergone comprehensive security audits and address similar vulnerabilities through modern secure coding practices.