CVE-1999-0319 in xmcd
Summary
by MITRE
buffer overflow in xmcd 2.1 allows local users to gain access through a user resource setting.
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Analysis
by VulDB Data Team • 04/03/2025
The vulnerability identified as CVE-1999-0319 represents a classic buffer overflow flaw within the xmcd 2.1 media player application, specifically targeting the user resource configuration handling mechanism. This issue resides in the X11-based multimedia application designed for playing audio CDs and managing music collections. The buffer overflow occurs when the application processes user-defined resource settings, particularly those related to configuration files or environment variables that control the player's behavior and interface elements. The flaw manifests during the parsing of resource specifications where insufficient bounds checking allows malicious input to overwrite adjacent memory locations, potentially leading to arbitrary code execution with the privileges of the affected user account.
The technical implementation of this vulnerability stems from improper input validation within the xmcd application's resource parsing routines. When users configure preferences through resource files or command-line parameters, the application fails to adequately verify the length of input strings before copying them into fixed-size buffers. This classic programming error creates an exploitable condition where an attacker can craft specially formatted resource settings that exceed the allocated buffer space, causing memory corruption that may be leveraged to execute malicious code. The vulnerability specifically affects the local privilege escalation vector since the application typically runs with the user's privileges and does not require elevated permissions to exploit.
From an operational perspective, this vulnerability presents a significant risk to systems where users have the ability to modify application configurations or where xmcd is used in multi-user environments. The impact extends beyond simple denial of service to potential privilege escalation, as local attackers can manipulate the resource settings to execute arbitrary commands with the target user's privileges. The attack surface includes any system where xmcd is installed and where users can modify resource files or environment variables that influence the application's behavior. Security implications include potential data compromise, system reconnaissance, and the possibility of establishing persistent access through the exploited application. The vulnerability's exploitation typically requires social engineering or access to user accounts, but once exploited, it can provide attackers with a foothold for further system compromise.
The remediation approach for this vulnerability involves implementing proper bounds checking and input validation within the xmcd application's resource parsing code. System administrators should immediately update to patched versions of xmcd or apply vendor-specific security patches that address the buffer overflow condition. Additionally, users should be educated about the risks of modifying application configuration files and the importance of using trusted resource settings. Security measures should include implementing proper access controls to prevent unauthorized modification of xmcd configuration files and monitoring for suspicious resource file changes. The vulnerability aligns with CWE-121, which addresses stack-based buffer overflow conditions, and may map to ATT&CK technique T1068, focusing on exploit for privilege escalation. Organizations should consider implementing application whitelisting policies to restrict execution of vulnerable versions and conduct regular security assessments to identify similar buffer overflow vulnerabilities in other legacy applications.