CVE-2006-1268 in X2300
Summary
by MITRE
The Internet Key Exchange implementation in Funkwerk X2300 7.2.1 allows remote attackers to cause a denial of service and possibly execute arbitrary code via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite. NOTE: due to the lack of details in the advisory, it is unclear which of CVE-2005-3666, CVE-2005-3667, and/or CVE-2005-3668 this issue applies to.
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Analysis
by VulDB Data Team • 07/21/2018
The vulnerability identified as CVE-2006-1268 affects the Internet Key Exchange implementation within Funkwerk X2300 version 7.2.1, representing a critical security flaw in the cryptographic key exchange protocol that underpins secure communications. This issue manifests through improper handling of crafted Internet Key Exchange packets, specifically targeting the Phase 1 and Phase 2 negotiation processes that establish secure tunnels for data transmission. The vulnerability stems from insufficient input validation and buffer management within the IKE daemon, creating opportunities for malicious actors to exploit memory corruption weaknesses that could lead to system instability or unauthorized code execution.
The technical exploitation of this vulnerability involves sending specially crafted IKE packets that trigger buffer overflows or other memory corruption conditions within the X2300's implementation. These malformed packets can cause the system to crash or behave unpredictably during the key exchange process, effectively rendering the device unable to establish or maintain secure connections. The vulnerability's potential for arbitrary code execution arises from the memory corruption patterns that allow attackers to inject and execute malicious code within the device's memory space, particularly when the system attempts to process the malformed packets during IKE negotiation. This type of vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-122, which covers stack-based buffer overflow scenarios that can lead to code execution.
The operational impact of this vulnerability extends beyond simple denial of service, as it creates potential entry points for more sophisticated attacks within network infrastructure. Network administrators may experience complete service disruption when attackers exploit this vulnerability, leading to extended downtime and potential data exposure during the attack window. The device's inability to properly handle legitimate IKE traffic alongside malicious packets creates a cascading effect that can compromise the entire secure communication infrastructure relying on the X2300 appliance. Organizations using this device in critical network segments face heightened risk of unauthorized access, man-in-the-middle attacks, and potential lateral movement within their network environments, particularly when the device serves as a gateway for IPSec VPN connections.
Mitigation strategies for this vulnerability require immediate firmware updates from Funkwerk to address the buffer overflow conditions in the IKE implementation. Network administrators should implement network segmentation to limit exposure of the vulnerable device to untrusted networks and establish monitoring protocols to detect unusual IKE traffic patterns that may indicate exploitation attempts. The implementation of intrusion detection systems with signature-based detection for known malicious IKE packet patterns can provide early warning of attempted exploitation. Additionally, organizations should consider disabling unnecessary IKE features and implementing strict access controls for the device management interfaces to minimize the attack surface. This vulnerability demonstrates the importance of proper input validation in cryptographic implementations and aligns with ATT&CK technique T1071.004 for application layer protocol tunneling and T1499.004 for network disruption attacks, emphasizing the need for comprehensive security measures in network infrastructure devices.