CVE-2005-0101 in Newspost
Summary
by MITRE
Buffer overflow in the socket_getline function in Newspost 2.1.1 and earlier allows remote malicious NNTP servers to execute arbitrary code via a long string without a newline character.
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Analysis
by VulDB Data Team • 12/22/2024
The vulnerability identified as CVE-2005-0101 represents a critical buffer overflow flaw within the socket_getline function of Newspost version 2.1.1 and earlier. This issue specifically affects NNTP (Network News Transfer Protocol) client implementations that process incoming data from news servers. The flaw manifests when the application encounters a maliciously crafted string that lacks a newline character, causing the buffer to overflow and potentially allowing remote code execution. The vulnerability stems from inadequate input validation and bounds checking within the socket reading mechanism, creating an exploitable condition that can be triggered through network communication with malicious NNTP servers.
The technical implementation of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The socket_getline function fails to properly validate the length of incoming data before copying it into fixed-size buffers, creating a scenario where an attacker can craft a specially formatted string that exceeds the allocated buffer space. This condition enables the execution of arbitrary code with the privileges of the affected application, typically resulting in complete system compromise. The vulnerability operates through the standard NNTP protocol communication channels, making it particularly dangerous as it can be exploited without requiring authentication or local access to the target system.
From an operational perspective, this vulnerability presents significant risk to organizations relying on NNTP-based news server communications and news reading applications. The remote exploit capability means that malicious actors can compromise systems from anywhere on the network without requiring physical access or prior authentication. The attack vector specifically targets the socket_getline function which is commonly used in news client applications, making it a potential threat to email systems, news readers, and other applications that process NNTP data. The impact extends beyond individual system compromise to potentially enable broader network infiltration, as compromised systems can serve as launching points for further attacks within the network infrastructure.
Mitigation strategies for CVE-2005-0101 should prioritize immediate patching of affected Newspost installations to version 2.1.2 or later, which contains the necessary buffer overflow protections. Organizations should implement network segmentation to isolate NNTP services from critical systems and deploy intrusion detection systems to monitor for suspicious NNTP traffic patterns. The implementation of input validation measures and bounds checking within the socket reading functions provides additional defense-in-depth layers. Security teams should also consider disabling unnecessary NNTP services and implementing strict access controls to limit exposure. The vulnerability demonstrates the importance of proper buffer management in network applications and aligns with ATT&CK technique T1059.007 for execution through command and scripting interpreter, as successful exploitation would allow attackers to execute arbitrary commands on the compromised system. Regular security assessments and code reviews focusing on buffer handling practices remain essential for preventing similar vulnerabilities in other network applications.