CVE-2017-2310 in Junos Space
Summary
by MITRE
A firewall bypass vulnerability in the host based firewall of Juniper Networks Junos Space versions prior to 16.1R1 may permit certain crafted packets, representing a network integrity risk.
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Analysis
by VulDB Data Team • 05/31/2017
The vulnerability identified as CVE-2017-2310 represents a critical firewall bypass flaw within Juniper Networks Junos Space platform versions earlier than 16.1R1. This issue resides in the host-based firewall implementation that governs network traffic control and access management within the Junos Space environment. The vulnerability specifically affects the packet processing logic that determines whether incoming or outgoing network traffic should be permitted or blocked based on predefined security policies. Network administrators and security professionals who rely on Junos Space for centralized network management and security enforcement are particularly at risk when operating affected versions of the software.
The technical implementation flaw manifests in the improper handling of crafted network packets that exploit a weakness in the host-based firewall's packet inspection mechanism. When these specially constructed packets traverse the network stack, they bypass the intended security controls that should normally filter or block such traffic based on established policy rules. This occurs due to a failure in the packet validation logic that should normally examine packet headers, payload contents, and protocol compliance against configured firewall rules. The vulnerability essentially allows malicious actors to craft packets that appear legitimate to the firewall's inspection process while actually containing payloads or characteristics that should trigger blocking actions under normal circumstances. The flaw operates at the network protocol level, affecting the fundamental packet filtering capabilities that protect network infrastructure from unauthorized access and malicious traffic.
The operational impact of this vulnerability extends beyond simple network access control failures and represents a significant threat to network integrity and overall security posture. Organizations utilizing affected Junos Space versions face potential unauthorized network access, data exfiltration, and lateral movement capabilities that could be exploited by threat actors. The bypass mechanism allows attackers to circumvent network security controls that should prevent specific traffic patterns or protocols from traversing the network infrastructure. This vulnerability particularly affects environments where Junos Space serves as the central management platform for multiple network devices, as the compromised firewall controls could enable attackers to gain access to protected segments of the network. The implications include potential compromise of sensitive data, disruption of network services, and unauthorized access to critical network infrastructure components that rely on proper firewall enforcement.
Security professionals should implement immediate mitigation strategies including upgrading to Junos Space version 16.1R1 or later, which contains the necessary patches to address the firewall bypass vulnerability. Organizations should also conduct comprehensive network assessments to identify any potential exploitation attempts and monitor network traffic for anomalous patterns that might indicate exploitation of this vulnerability. Network segmentation strategies should be reinforced to limit the potential impact of any successful bypass attempts, while additional security controls such as intrusion detection systems and network monitoring tools should be deployed to detect unauthorized access attempts. The vulnerability aligns with CWE-284, which describes improper access control in software systems, and represents a significant risk under ATT&CK framework's T1071.004 technique for application layer protocol usage. Organizations should also consider implementing network behavior analysis tools that can detect abnormal packet patterns and provide additional layers of defense against exploitation of this class of vulnerabilities.