CVE-2013-6015 in Junos
Summary
by MITRE
Juniper Junos before 10.4S14, 11.4 before 11.4R5-S2, 12.1R before 12.1R3, 12.1X44 before 12.1X44-D20, and 12.1X45 before 12.1X45-D15 on SRX Series services gateways, when a plugin using TCP proxy is configured, allows remote attackers to cause a denial service (flow daemon crash) via an unspecified sequence of TCP packets.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 12/23/2024
The vulnerability identified as CVE-2013-6015 affects Juniper Junos operating system versions prior to specific security releases on SRX Series services gateways. This issue specifically manifests when TCP proxy plugins are configured within the network infrastructure, creating a pathway for remote attackers to exploit a flaw in the flow daemon processing mechanism. The vulnerability represents a significant concern for network security operations as it enables attackers to remotely trigger system instability through carefully crafted TCP packet sequences, potentially leading to complete service disruption.
The technical flaw resides in the flow daemon's handling of TCP proxy plugin interactions when processing network traffic. When a TCP proxy plugin is active, the system's flow daemon fails to properly validate or manage certain sequences of TCP packets, causing the daemon to crash and restart. This behavior stems from inadequate input validation and error handling within the packet processing pipeline. The vulnerability is classified under CWE-20 as "Improper Input Validation" and demonstrates a classic example of how malformed network traffic can lead to denial of service conditions in network infrastructure devices. The attack vector requires only remote network access to the affected device, making it particularly dangerous as attackers can exploit this without physical presence or elevated privileges.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise network availability and reliability. When the flow daemon crashes, the SRX Series gateway experiences complete service interruption, leaving network traffic unmanaged and potentially creating security gaps in the network perimeter. This type of denial of service attack can be particularly damaging in enterprise environments where network availability is critical for business operations. The vulnerability affects multiple Junos versions across different release series, indicating a widespread issue that required coordinated patching across various product lines. Organizations running affected versions face the risk of extended downtime, potential data loss during service restoration, and increased operational overhead during incident response activities.
Mitigation strategies for CVE-2013-6015 should prioritize immediate deployment of available security patches from Juniper, specifically targeting the affected Junos versions mentioned in the vulnerability description. Network administrators should implement network segmentation and access controls to limit exposure of affected devices to untrusted networks. Monitoring solutions should be enhanced to detect unusual flow daemon behavior or repeated connection attempts that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1499.004 for "Network Denial of Service" and represents a clear example of how network infrastructure devices can be targeted to achieve service disruption. Organizations should also consider implementing intrusion detection systems that can identify the specific packet patterns associated with this vulnerability and maintain detailed network logging to facilitate forensic analysis should an attack occur. Regular vulnerability assessments and security audits should be conducted to identify other potential weaknesses in network infrastructure that could be exploited in similar attacks.