CVE-2008-5754 in BulletProof FTP Client
Summary
by MITRE
Stack-based buffer overflow in BulletProof FTP Client allows user-assisted attackers to execute arbitrary code via a .bps file (aka Session-File) with a long second line, possibly a related issue to CVE-2008-5753.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 11/21/2024
The vulnerability identified as CVE-2008-5754 represents a critical stack-based buffer overflow flaw within the BulletProof FTP Client software that exposes users to significant security risks. This vulnerability specifically affects the client's handling of .bps files, which are session files used to store connection parameters and configuration settings for FTP sessions. The flaw manifests when the application processes a maliciously crafted session file containing an excessively long second line, triggering unauthorized code execution capabilities for attackers who can convince victims to open such files.
The technical implementation of this vulnerability stems from inadequate input validation and bounds checking within the BulletProof FTP Client's file parsing routines. When the application reads the second line of a .bps file, it fails to properly verify the length of the data before copying it into a fixed-size stack buffer. This classic buffer overflow condition occurs because the software assumes that input data will not exceed predetermined limits, creating a scenario where attacker-controlled data can overwrite adjacent memory locations including return addresses and function pointers. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, which directly enables arbitrary code execution through memory corruption techniques.
The operational impact of CVE-2008-5754 extends beyond simple remote code execution to encompass a broader range of attack vectors that align with ATT&CK technique T1203 for Exploitation for Client Execution. An attacker can craft a malicious .bps file with an extended second line that, when opened by an unsuspecting user, results in the execution of arbitrary code with the privileges of the affected user. This vulnerability particularly affects environments where users frequently exchange FTP session files or where automated processes might download and execute such files. The user-assisted nature of the attack means that social engineering plays a crucial role in exploitation, as victims must be convinced to open the malicious session file. The related vulnerability CVE-2008-5753 indicates a pattern of similar flaws in the same software family, suggesting that the underlying architectural issues within the BulletProof FTP Client's file handling mechanisms require comprehensive remediation.
Mitigation strategies for CVE-2008-5754 should focus on both immediate defensive measures and long-term architectural improvements. Organizations should implement strict file validation policies that prevent execution of untrusted .bps files, particularly those that might originate from external sources or unverified users. The recommended approach includes disabling automatic session file execution, implementing file extension filtering, and establishing robust input sanitization routines that enforce maximum line length limits. System administrators should also consider deploying application whitelisting solutions that restrict execution of the BulletProof FTP Client to trusted environments. Additionally, regular security updates and patches should be applied immediately upon availability, as this vulnerability represents a high-severity risk that can be exploited remotely without requiring user interaction beyond opening a malicious file. The vulnerability's classification under ATT&CK T1203 emphasizes the need for user awareness training to prevent successful social engineering attacks that leverage this flaw.