CVE-2014-0614 in Junos
Summary
by MITRE
Juniper Junos 13.2 before 13.2R3 and 13.3 before 13.3R1, when PIM is enabled, allows remote attackers to cause a denial of service (kernel panic and crash) via a large number of crafted IGMP packets.
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Analysis
by VulDB Data Team • 05/10/2026
The vulnerability identified as CVE-2014-0614 represents a critical denial of service flaw affecting Juniper Junos operating system versions prior to specific security releases. This vulnerability specifically impacts devices running Junos 13.2 versions before 13.2R3 and 13.3 versions before 13.3R1 when Protocol Independent Multicast (PIM) functionality is enabled. The flaw stems from inadequate input validation within the IGMP packet processing mechanism, creating a condition where malformed or specially crafted IGMP packets can trigger system instability. The vulnerability operates at the kernel level, meaning that successful exploitation results in complete system crashes rather than merely service disruption, making it particularly dangerous for network infrastructure devices that require high availability.
The technical nature of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, though the specific implementation appears to involve memory corruption during IGMP packet handling rather than traditional buffer overflows. When PIM is enabled, the system's multicast routing capabilities become vulnerable to exploitation through crafted IGMP packets that contain malformed data structures or excessive packet sizes. The attack vector requires only network access to send malicious packets to the affected device, making it highly accessible to remote threat actors. The kernel panic occurs because the system cannot properly handle the malformed IGMP messages, leading to memory corruption that causes the operating system kernel to crash and restart, resulting in complete service interruption.
The operational impact of CVE-2014-0614 extends beyond simple service disruption as it affects the fundamental stability of network infrastructure equipment. Network devices running affected Junos versions become vulnerable to attacks that can cause unexpected downtime, potentially disrupting critical network services and communications. This vulnerability particularly affects enterprise and service provider networks where Junos devices serve as core routing and switching equipment, as the kernel crashes can lead to cascading failures throughout the network infrastructure. The remote nature of the attack means that adversaries do not require physical access or local network privileges to exploit the vulnerability, significantly increasing the attack surface and potential impact. Organizations with multiple affected devices face the risk of coordinated attacks that could simultaneously compromise several network nodes, leading to widespread service degradation.
Mitigation strategies for this vulnerability require immediate implementation of firmware updates to the affected Junos versions, specifically upgrading to 13.2R3 or 13.3R1 releases where the issue has been addressed. Network administrators should also implement network segmentation and access controls to limit exposure of affected devices to untrusted networks. The vulnerability can be mitigated through disabling PIM functionality on affected devices when it is not required for network operations, though this may impact multicast routing capabilities. Additionally, implementing network monitoring and intrusion detection systems can help identify unusual IGMP traffic patterns that may indicate exploitation attempts. Organizations should also consider implementing rate limiting on IGMP packets at network boundaries to reduce the impact of potential attacks. From an ATT&CK framework perspective, this vulnerability maps to T1499.004 (Endpoint Denial of Service) and T1566.002 (Phishing via Service) as attackers may use this vulnerability to disrupt network services or as part of broader attack campaigns targeting network infrastructure. The security community should also monitor for any related vulnerabilities in multicast routing implementations that may share similar attack patterns or underlying architectural weaknesses.