CVE-2005-3733 in JUNOS
Summary
by MITRE
The Internet Key Exchange version 1 (IKEv1) implementation in Juniper JUNOS and JUNOSe software for M, T, and J-series routers before release 6.4, and E-series routers before 7-1-0, 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 for IKEv1. 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 • 07/21/2024
The vulnerability described in CVE-2005-3733 represents a critical flaw in the Internet Key Exchange version 1 implementation within Juniper JUNOS and JUNOSe operating systems. This issue affects a broad range of Juniper router series including M, T, J-series routers running software versions prior to 6.4 and E-series routers before 7-1-0 releases. The vulnerability stems from insufficient input validation mechanisms within the IKEv1 protocol handler, creating a pathway for remote attackers to exploit the system through carefully crafted malicious IKE packets. The flaw specifically manifests in the processing of Internet Security Association and Key Management Protocol messages, which are fundamental to establishing secure communications in IPsec VPN environments.
The technical nature of this vulnerability aligns with CWE-129, which describes improper validation of array index values, and CWE-125, which covers out-of-bounds read conditions. Attackers can leverage this weakness by sending malformed IKE packets that trigger buffer overflows or memory corruption within the router's IKE processing modules. The exploitation can result in system crashes leading to denial of service conditions, while the underlying memory corruption vulnerabilities may potentially allow for arbitrary code execution on the affected devices. This vulnerability is particularly concerning because IKEv1 is a core component of secure network communications, and the attack can be executed remotely without requiring authentication credentials.
From an operational perspective, this vulnerability creates significant security risks for organizations relying on Juniper routers for network security infrastructure. The potential for remote code execution means that attackers could gain unauthorized access to network devices and potentially escalate privileges to gain control over the entire network infrastructure. The denial of service aspect impacts network availability and can disrupt critical business operations. According to ATT&CK framework, this vulnerability maps to T1071.001 for application layer protocols and T1499.004 for network disruption, while also representing a privilege escalation vector. The impact extends beyond simple network disruption as it compromises the integrity and availability of security infrastructure.
Mitigation strategies for this vulnerability require immediate implementation of software patches from Juniper, specifically upgrading to versions 6.4 for M, T, and J-series routers and 7-1-0 for E-series routers. Network administrators should also implement network segmentation and access control measures to limit exposure of vulnerable routers to untrusted networks. Monitoring for suspicious IKE traffic patterns and implementing intrusion detection systems can help detect exploitation attempts. The vulnerability highlights the importance of maintaining up-to-date security patches and following the principle of least privilege in network infrastructure deployments. Organizations should also consider implementing network access controls that restrict IKE traffic to trusted sources only, as the vulnerability can be exploited from external networks without authentication requirements.