CVE-2004-0780 in Solaris
Summary
by MITRE
Buffer overflow in uustat in Sun Solaris 8 and 9 allows local users to execute arbitrary code via a long -S command line argument.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/11/2025
The vulnerability identified as CVE-2004-0780 represents a critical buffer overflow flaw within the uustat utility of Sun Solaris 8 and 9 operating systems. This issue specifically affects the command line argument processing mechanism of uustat, which is part of the Unix-to-Unix Copy Protocol (UUCP) suite designed for communication between Unix systems. The vulnerability resides in how the utility handles the -S command line option, where insufficient input validation leads to memory corruption when processing excessively long arguments. This particular flaw demonstrates a classic buffer overflow condition classified under CWE-121, which involves insufficient restriction of operations within the bounds of a fixed-length buffer, making it susceptible to exploitation by malicious local users who can manipulate the input parameters to overwrite adjacent memory locations.
The technical exploitation of this vulnerability occurs through the manipulation of the -S command line argument, which is used to specify a system name for uustat to query. When a local attacker provides a command line argument that exceeds the allocated buffer size, the program fails to properly validate the input length, resulting in a buffer overflow condition. This overflow can overwrite critical memory segments including return addresses on the stack, allowing an attacker to redirect program execution flow to arbitrary code locations. The vulnerability specifically affects the uustat binary which typically runs with elevated privileges due to its role in system administration tasks, making successful exploitation particularly dangerous as it can lead to privilege escalation and full system compromise.
The operational impact of this vulnerability extends beyond simple local privilege escalation, as it provides attackers with a mechanism to execute arbitrary code on affected Solaris systems with potentially elevated privileges. The vulnerability affects both Solaris 8 and 9 versions, representing a significant security gap in the Unix-based operating system family that was prevalent during the early 2000s. Given that uustat is commonly used for monitoring print queues and system status information, the attack surface is relatively broad, as the utility may be invoked by various system processes or administrative scripts. This vulnerability aligns with ATT&CK technique T1068, which involves exploiting legitimate credentials and system utilities to gain unauthorized access, and T1059, which covers command and scripting interpreter usage. The impact is particularly severe because it allows local users to potentially gain root privileges, making it a preferred target for attackers seeking persistent access to systems.
Mitigation strategies for CVE-2004-0780 should focus on immediate patch deployment from Sun Microsystems, which would involve applying the appropriate security updates and patches to address the buffer overflow condition in uustat. System administrators should also implement input validation controls and restrict access to the uustat utility where possible, particularly in environments where untrusted users may have local access. The implementation of address space layout randomization (ASLR) and stack canary protections can provide additional defense-in-depth measures against exploitation attempts. Additionally, monitoring for unusual uustat invocation patterns and implementing proper access controls through discretionary access control mechanisms can help detect and prevent exploitation attempts. Organizations should also consider implementing the principle of least privilege, ensuring that users have only the minimum necessary permissions to perform their required tasks, thereby limiting the potential impact of successful exploitation attempts. The vulnerability serves as a reminder of the importance of proper input validation and memory safety practices in system utilities, particularly those with elevated privileges and broad system access capabilities.