CVE-2005-0830 in DYNDNSUpdate
Summary
by MITRE
Multiple buffer overflows in Xzabite DYNDNSUpdate 0.6.15 and earlier, including the ipcheck function in dyndnsupdate.c, allow remote attackers who spoof a dyndns.org server to execute arbitrary code via unknown vectors.
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Analysis
by VulDB Data Team • 07/01/2021
The vulnerability identified as CVE-2005-0830 represents a critical security flaw affecting Xzabite DYNDNSUpdate version 0.6.15 and earlier implementations. This vulnerability manifests through multiple buffer overflow conditions that occur within the software's dynamic dns update functionality, specifically within the ipcheck function located in the dyndnsupdate.c source file. The flaw enables remote attackers to potentially execute arbitrary code on systems running the affected software when they successfully spoof a legitimate dyndns.org server.
Buffer overflow vulnerabilities of this nature fall under the common weakness enumeration CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The specific implementation flaw in the ipcheck function suggests that the software fails to properly validate input lengths when processing dns update responses from server endpoints, creating opportunities for malicious data injection that can overwrite critical program memory structures.
The operational impact of this vulnerability extends beyond simple code execution, as it enables attackers to manipulate the dynamic dns update process in ways that could compromise the entire system. When an attacker successfully spoofs a dyndns.org server, they can craft malicious responses that trigger the buffer overflow conditions, potentially leading to complete system compromise. This vulnerability is particularly dangerous because it operates within the context of dns update functionality, which often runs with elevated privileges or has network access capabilities that could be exploited for further system penetration.
The attack vector leverages the trust relationship that exists between the dyndns update client and the dns server infrastructure, allowing attackers to exploit the client-side validation mechanisms. This aligns with attack techniques described in the attack tree framework where network-based attacks can be escalated through credential compromise or privilege escalation. The vulnerability's potential for remote code execution makes it particularly attractive to attackers seeking persistent access to affected systems.
Mitigation strategies for this vulnerability should include immediate patching of the affected software to version 0.6.16 or later, which contains the necessary buffer overflow protections. System administrators should also implement network monitoring to detect suspicious dns update traffic patterns and consider implementing additional authentication mechanisms for dns update processes. The remediation process should include thorough code review of the ipcheck function to ensure proper bounds checking and input validation. Organizations should also consider implementing network segmentation to limit the potential impact of successful exploitation, as outlined in the cybersecurity framework for network boundary protection. Additionally, regular security assessments of dns update client implementations can help identify similar vulnerabilities in other network infrastructure components that may be susceptible to similar buffer overflow attack patterns.