CVE-2006-0804 in TIN
Summary
by MITRE
Off-by-one error in TIN 1.8.0 and earlier might allow attackers to execute arbitrary code via unknown vectors that trigger a buffer overflow.
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Analysis
by VulDB Data Team • 07/11/2019
The vulnerability identified as CVE-2006-0804 represents a critical buffer overflow condition within the TIN newsreader software version 1.8.0 and earlier releases. This flaw stems from an off-by-one error that occurs during memory allocation or data processing operations, creating a situation where an attacker can manipulate input data to exceed allocated buffer boundaries. The vulnerability manifests through unknown vectors that trigger the buffer overflow condition, making it particularly challenging to predict and defend against. The TIN software, being a widely-used newsreader for usenet newsgroups, presents an attractive target for attackers seeking to exploit such memory corruption vulnerabilities.
The technical implementation of this vulnerability involves a classic buffer overflow scenario where the off-by-one error allows an attacker to write beyond the intended memory boundaries of a buffer structure. This type of error typically occurs when boundary checks are performed incorrectly, often using comparisons such as <= instead of <, or when array indexing calculations are miscalculated. The resulting overflow can overwrite adjacent memory locations, potentially corrupting program state, stack frames, or even executable code. The unspecified vectors that trigger this condition suggest that the vulnerability could be activated through various input methods including malformed news articles, configuration parameters, or network data processing operations within the TIN software.
The operational impact of this vulnerability extends beyond simple code execution, as it represents a fundamental memory safety issue that can be leveraged for privilege escalation and system compromise. When successfully exploited, the buffer overflow can allow attackers to inject and execute arbitrary code with the privileges of the TIN process, which typically runs with user-level permissions but could potentially be elevated through other means. The vulnerability affects systems where TIN is installed and actively processing news data, particularly in environments where users might encounter malicious news articles or where the software is used in automated processing scenarios. This makes the vulnerability particularly dangerous in server environments or when TIN is used as part of larger automated systems.
Mitigation strategies for CVE-2006-0804 should focus on immediate software updates to versions that address the off-by-one error and buffer overflow conditions. System administrators should prioritize patching affected installations and implementing network segmentation to limit exposure. Additionally, input validation measures and runtime protections such as stack canaries or address space layout randomization can provide defense-in-depth protection against exploitation attempts. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and could be categorized under ATT&CK technique T1059 for command and script injection. Organizations should also consider implementing intrusion detection systems to monitor for exploitation attempts and maintain regular security assessments to identify similar memory corruption vulnerabilities in other software components.