CVE-2007-1567 in WarFTPD
Summary
by MITRE
Stack-based buffer overflow in War FTP Daemon 1.65, and possibly earlier, allows remote attackers to cause a denial of service or execute arbitrary code via unspecified vectors, as demonstrated by warftp_165.tar by Immunity. NOTE: this might be the same issue as CVE-1999-0256, CVE-2000-0131, or CVE-2006-2171, but due to Immunity s lack of details, this cannot be certain.
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Analysis
by VulDB Data Team • 10/13/2017
The vulnerability described in CVE-2007-1567 represents a critical stack-based buffer overflow flaw within the War FTP Daemon version 1.65 and potentially earlier releases. This type of vulnerability falls under the CWE-121 category of Stack-based Buffer Overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations on the program's stack. The War FTP Daemon, as an FTP server implementation, handles various network requests from clients and processes these inputs without adequate validation, creating an exploitable condition that can be leveraged by remote attackers.
The technical exploitation of this vulnerability occurs through unspecified attack vectors that involve sending specially crafted input to the FTP daemon service. When the daemon processes these malformed inputs, the buffer overflow condition is triggered, potentially allowing an attacker to overwrite the return address of the function on the stack. This overwrite enables the execution of arbitrary code with the privileges of the running service, which typically operates with elevated permissions. The vulnerability's remote nature means that attackers do not need physical access to the system and can exploit it over the network, making it particularly dangerous for publicly accessible FTP servers.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to include complete system compromise. When successfully exploited, the buffer overflow allows attackers to execute arbitrary code on the target system, potentially leading to full system control, data exfiltration, or establishment of persistent backdoors. The daemon's operation as an FTP service means that any client connecting to it could potentially trigger the vulnerability, making it a high-risk issue for organizations running this software. The vulnerability's potential to be exploited for privilege escalation and remote code execution aligns with the ATT&CK framework's techniques for privilege escalation and execution, specifically targeting service execution and remote code execution capabilities.
The ambiguity surrounding this vulnerability's relationship to other CVE identifiers including CVE-1999-0256, CVE-2000-0131, and CVE-2006-2171 highlights the challenges in vulnerability correlation and tracking. These potential duplicate identifications suggest that similar buffer overflow flaws may have existed across different versions and implementations of FTP daemon software, indicating a pattern of inadequate input validation in this class of applications. The lack of detailed information from Immunity's warftp_165.tar demonstration package further complicates the precise analysis of the exploitation vectors, though the fundamental nature of the vulnerability remains clear.
Mitigation strategies for CVE-2007-1567 primarily focus on immediate software updates and patches provided by the vendor or security communities. Organizations should prioritize upgrading to patched versions of the War FTP Daemon or migrating to more modern and actively maintained FTP server implementations. Network segmentation and firewall rules can help limit exposure by restricting access to FTP services to trusted networks only. Additionally, implementing intrusion detection systems that monitor for suspicious FTP traffic patterns and conducting regular security audits of network services can help detect potential exploitation attempts. The vulnerability's classification as a stack-based buffer overflow makes it particularly susceptible to modern exploit mitigation techniques including stack canaries, address space layout randomization, and data execution prevention mechanisms that should be enabled on systems running vulnerable software.