CVE-2005-3666 in Switched Firewall
Summary
by MITRE
Multiple unspecified format string vulnerabilities in multiple unspecified implementations of Internet Key Exchange version 1 (IKEv1) have multiple unspecified attack vectors and impacts, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1. NOTE: due to the lack of information in the original sources, it is likely that this candidate will be REJECTed once it is known which implementations are actually vulnerable.
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Analysis
by VulDB Data Team • 07/21/2024
The vulnerability identified as CVE-2005-3666 represents a critical security flaw within Internet Key Exchange version 1 implementations that could potentially affect numerous network security protocols. This issue manifests as multiple unspecified format string vulnerabilities within the IKEv1 framework, which is fundamental to establishing secure communications in virtual private networks and other cryptographic protocols. The vulnerability specifically impacts the protocol's handling of input data structures and could allow attackers to manipulate memory operations through malformed input sequences. The original description indicates that these vulnerabilities were demonstrated through the PROTOS ISAKMP Test Suite for IKEv1, suggesting that the flaw exists in how the protocol processes certain message formats and parameter handling within the key exchange mechanism. Format string vulnerabilities typically occur when applications use user-supplied input directly in printf-style functions without proper sanitization, creating opportunities for attackers to execute arbitrary code or cause denial of service conditions.
The technical nature of these format string vulnerabilities within IKEv1 implementations places them squarely within the scope of CWE-134, which specifically addresses the use of format strings inappropriately, and potentially CWE-121, which deals with stack-based buffer overflows that can result from improper input handling. These vulnerabilities operate at the protocol level where the IKEv1 implementation processes incoming packets and parameters, making them particularly dangerous as they can be exploited during the initial key exchange phase of secure communications. The attack vectors remain unspecified due to the lack of detailed information about which specific implementations are affected, but the implications suggest that any system relying on IKEv1 for security protocol establishment could be at risk. The absence of specific implementation details in the original reporting makes it difficult to determine the exact exploitation mechanisms, though such vulnerabilities typically involve manipulating the format string arguments passed to printf functions or similar formatting routines that process incoming protocol messages.
The operational impact of these vulnerabilities extends beyond simple protocol failures to potentially compromise entire network security infrastructures that depend on IKEv1 for secure communications. When exploited, these format string vulnerabilities could allow attackers to execute arbitrary code on vulnerable systems, potentially leading to complete system compromise or unauthorized access to encrypted communications channels. The timing of exploitation is particularly critical as these vulnerabilities would likely be triggered during the initial handshake phase of IKEv1 negotiations, meaning that any network traffic attempting to establish secure connections could be targeted. The unspecified nature of the attack vectors suggests that multiple exploitation techniques may be possible, depending on the specific implementation details of the vulnerable systems, which complicates defensive measures and increases the potential attack surface. Organizations using IKEv1 implementations for VPN connections, firewall communications, or other security protocol functions would be particularly vulnerable to these types of attacks, as the key exchange process represents a critical point where attackers could gain unauthorized access to cryptographic keys or system resources.
The recommended mitigations for this vulnerability category typically involve immediate patching of affected implementations and implementation of input validation measures to prevent format string exploitation. System administrators should prioritize updating their IKEv1 implementations to versions that address these format string handling issues, while also implementing network monitoring to detect potential exploitation attempts. The use of secure coding practices and proper input sanitization within protocol implementations can prevent these types of vulnerabilities from occurring in the first place. Organizations should also consider implementing network segmentation and access controls to limit the potential impact of successful exploitation attempts. Additionally, due to the lack of specific implementation details in the original vulnerability reporting, it is essential to conduct thorough vulnerability assessments of all IKEv1 implementations within the network infrastructure, particularly those that are exposed to external networks or untrusted environments. The ATT&CK framework would categorize this vulnerability under T1059 for command and script injection techniques, and potentially T1133 for external remote services, as attackers could leverage these vulnerabilities to gain unauthorized access to network security services. Given the nature of IKEv1 as a foundational protocol for network security, organizations should also review their overall security architecture to ensure that alternative secure communication channels are available in case of IKEv1 compromise, and consider implementing additional layers of authentication and encryption to protect against potential exploitation of these vulnerabilities.