CVE-2003-0685 in Netris
Summary
by MITRE
Buffer overflow in Netris 0.52 and earlier, and possibly other versions, allows remote malicious Netris servers to execute arbitrary code on netris clients via a long server response.
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Analysis
by VulDB Data Team • 05/01/2019
The vulnerability identified as CVE-2003-0685 represents a critical buffer overflow flaw affecting Netris versions 0.52 and earlier, with potential impact extending to other affected versions. This security weakness resides within the client-side processing of server responses, creating an avenue for remote code execution through carefully crafted malicious inputs. The vulnerability operates by exploiting improper input validation mechanisms within the Netris client software, specifically when handling responses from Netris servers.
The technical implementation of this buffer overflow occurs during the processing of network responses where the client application fails to properly validate the length of incoming data before copying it into fixed-size memory buffers. When a malicious Netris server sends a response containing excessive data beyond the allocated buffer capacity, the overflow corrupts adjacent memory regions and can potentially overwrite critical program execution data including return addresses and function pointers. This memory corruption allows attackers to redirect program execution flow and inject malicious code that executes with the privileges of the affected client process.
From an operational perspective, this vulnerability presents a significant threat to network security infrastructure as it enables remote attackers to gain unauthorized code execution capabilities on vulnerable client systems without requiring any authentication or prior access. The attack vector operates entirely over the network, making it particularly dangerous as it can be exploited from anywhere on the internet. The impact extends beyond individual client compromise to potentially enable broader network infiltration, privilege escalation, and persistent access to compromised systems. The vulnerability affects both the integrity and confidentiality of network communications, as compromised clients can be used as stepping stones for further attacks within the network perimeter.
Security professionals should implement immediate mitigations including updating to patched versions of Netris software, implementing network segmentation to limit exposure, and deploying intrusion detection systems to monitor for suspicious network traffic patterns. The vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and maps to ATT&CK technique T1059.007 for remote code execution through network services. Organizations should also consider implementing network access controls to restrict communication between Netris clients and untrusted servers, and establish monitoring procedures to detect potential exploitation attempts. Additionally, the vulnerability highlights the importance of proper input validation and memory management practices in network applications, emphasizing the need for secure coding standards and regular security assessments of network infrastructure components.