CVE-2004-1595 in ShixxNote
Summary
by MITRE
Buffer overflow in ShixxNote 6.net build 117 allows remote attackers to execute arbitrary code via a long font field.
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Analysis
by VulDB Data Team • 10/05/2025
The vulnerability identified as CVE-2004-1595 represents a classic buffer overflow flaw within ShixxNote 6.net version build 117, a note-taking application designed for networked environments. This security weakness arises from insufficient input validation mechanisms within the application's handling of font field data, creating a pathway for malicious actors to exploit the software through remote code execution. The vulnerability specifically manifests when the application processes font parameters that exceed predetermined buffer limits, allowing attackers to overwrite adjacent memory locations and potentially gain unauthorized control over the affected system.
The technical implementation of this buffer overflow vulnerability aligns with CWE-121, which categorizes buffer overflow conditions where insufficient bounds checking allows data to be written beyond allocated memory buffers. The flaw occurs during the parsing of font field parameters within the network communication protocol, where the application fails to properly validate the length of incoming font data before attempting to store it in fixed-size memory buffers. This insufficient validation creates an exploitable condition where an attacker can craft malicious input containing excessive font data, causing the buffer to overflow and potentially overwrite critical program execution structures including return addresses and function pointers.
From an operational perspective, this vulnerability presents significant risk to organizations utilizing ShixxNote 6.net in networked environments, as it enables remote code execution without requiring authentication or local access privileges. The attack vector operates entirely through network communication channels, allowing adversaries to exploit the flaw from external positions without physical access to target systems. The implications extend beyond simple privilege escalation, as successful exploitation could enable attackers to install persistent backdoors, exfiltrate sensitive data, or establish command and control capabilities within the compromised network infrastructure. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under the T1059 category, specifically targeting remote code execution through application vulnerabilities.
The exploitation of this buffer overflow vulnerability requires careful crafting of malicious font data that exceeds the buffer capacity, typically involving precise calculations of memory layout and payload placement. Attackers must account for stack alignment, potential null byte termination issues, and the specific memory organization of the target application to successfully execute their malicious code. The vulnerability's remote nature makes it particularly dangerous as it can be exploited by attackers from anywhere on the internet without requiring network proximity or physical access to the target system. Organizations running affected versions of ShixxNote 6.net face immediate risk of compromise, as the vulnerability does not require any specialized tools or advanced technical knowledge to exploit, making it accessible to threat actors across different skill levels.
Mitigation strategies for CVE-2004-1595 should prioritize immediate application patching and version updates from the vendor, as this vulnerability represents a known flaw with documented exploitation techniques. Network segmentation and firewall rule implementation can help reduce attack surface by restricting access to affected systems and limiting potential exploitation paths. Additionally, implementing input validation controls at network boundaries and conducting regular security assessments can help identify similar vulnerabilities in other applications within the organization's infrastructure. The vulnerability also underscores the importance of secure coding practices and regular vulnerability scanning to prevent similar buffer overflow conditions from occurring in future software deployments. Organizations should consider implementing application whitelisting policies and monitoring for anomalous network traffic patterns that might indicate exploitation attempts.