CVE-2007-1569 in NewsBin Pro
Summary
by MITRE
Stack-based buffer overflow in NewsBin Pro 4.32 allows remote attackers to cause a denial of service or execute arbitrary code via a yEnc (yEncode) encoded article with a long filename, as demonstrated using a .nzb file. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 08/28/2024
The vulnerability identified as CVE-2007-1569 represents a critical stack-based buffer overflow flaw in NewsBin Pro version 4.32, a popular newsgroup client used for downloading and managing binary files from usenet networks. This vulnerability specifically manifests when the application processes yEnc encoded articles containing excessively long filenames within .nzb files, creating a dangerous condition that can be exploited by remote attackers to compromise system integrity. The flaw resides in the application's insufficient input validation mechanisms when handling encoded article metadata, particularly filename fields that are processed without adequate bounds checking.
The technical exploitation of this vulnerability occurs through the manipulation of yEnc encoding parameters within .nzb files, which are standard formats used to describe and retrieve binary content from usenet servers. When NewsBin Pro encounters a yEnc encoded article with an oversized filename, the application fails to properly validate the length of the filename string before copying it onto the stack. This results in a classic stack buffer overflow condition where the excessive data overwrites adjacent memory locations, potentially corrupting the stack frame and execution pointers. The vulnerability is particularly dangerous because it can be triggered through legitimate network operations without requiring any special privileges or user interaction, making it an ideal candidate for automated exploitation.
From an operational impact perspective, this vulnerability creates significant risks for organizations relying on usenet-based file distribution systems, as attackers can leverage it to either cause denial of service by crashing the application or achieve arbitrary code execution on vulnerable systems. The exploitability of this flaw means that remote attackers can potentially gain full control over systems running vulnerable versions of NewsBin Pro, especially in environments where the application runs with elevated privileges or processes sensitive data. The vulnerability affects not only individual users but also enterprise environments that depend on usenet clients for software distribution, backup operations, or content management systems that utilize .nzb file structures.
Security professionals should note that this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a common vector for privilege escalation attacks in client-side applications. The ATT&CK framework categorizes this type of vulnerability under the technique of "Exploitation for Privilege Escalation" and "Command and Control" when used in conjunction with other attack vectors. Organizations should immediately implement mitigations including patching to the latest version of NewsBin Pro, implementing network segmentation to limit exposure, and deploying intrusion detection systems that can identify malicious .nzb file patterns. Additionally, input validation should be enhanced at multiple layers including application-level checks, network-based filtering, and user education regarding the dangers of untrusted .nzb file downloads from unverified sources.