CVE-2004-0800 in CDE Mailer
Summary
by MITRE
Format string vulnerability in CDE Mailer (dtmail) on Solaris 8 and 9 allows local users to gain privileges via format strings in the argv[0] value.
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Analysis
by VulDB Data Team • 01/22/2025
The vulnerability identified as CVE-2004-0800 represents a critical format string flaw within the Common Desktop Environment Mailer component known as dtmail on Solaris 8 and 9 operating systems. This issue specifically affects the command line argument processing mechanism where the argv[0] parameter is improperly handled, creating a potential privilege escalation vector for local attackers. The vulnerability resides in the way the mailer application processes user input through command line arguments, particularly when these arguments contain format specifiers that are not properly sanitized or validated before being used in printf-style functions.
The technical exploitation of this vulnerability occurs when a local user crafts a malicious argv[0] value containing format string specifiers such as %x, %s, or %n that can be interpreted by the underlying printf family functions. When the dtmail application processes this malformed input without proper validation, it can lead to arbitrary memory reads, writes, or even code execution depending on the specific implementation details. The format string vulnerability allows attackers to manipulate the program's execution flow by overwriting memory locations, potentially gaining elevated privileges through the privilege escalation mechanism inherent in the application's operation. This type of vulnerability is classified under CWE-134 as "Use of Externally-Controlled Format String" and represents a well-documented pattern of insecure coding practices that has been consistently flagged in security assessments.
The operational impact of this vulnerability extends beyond simple privilege escalation to potentially compromise the entire desktop environment and underlying system security. Local users who can execute the dtmail application with elevated privileges or who can manipulate the execution context of the application can leverage this flaw to execute arbitrary code with the privileges of the target process. This creates a significant risk for system integrity and confidentiality, particularly in multi-user environments where the mailer application may be invoked with root privileges or where users have the ability to influence command line arguments. The vulnerability affects systems running Solaris 8 and 9, which were widely deployed in enterprise environments during the early 2000s, making this a historically significant issue that demonstrates the importance of proper input validation in system components.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected Solaris systems through official Oracle security updates, as well as implementing proper input validation mechanisms within the application code. System administrators should also consider implementing additional security controls such as restricting access to the dtmail application, monitoring for suspicious command line arguments, and employing privilege separation techniques to limit the potential impact of successful exploitation. The vulnerability aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation" and demonstrates the critical need for secure coding practices in system-level applications. Organizations should also implement comprehensive application whitelisting policies and regular security assessments to identify similar vulnerabilities in other system components that may be susceptible to format string attacks, as this class of vulnerability remains prevalent in legacy systems and applications where proper input sanitization has not been implemented.