CVE-2017-2313 in Junos
Summary
by MITRE
Juniper Networks devices running affected Junos OS versions may be impacted by the receipt of a crafted BGP UPDATE which can lead to an rpd (routing process daemon) crash and restart. Repeated crashes of the rpd daemon can result in an extended denial of service condition. The affected Junos OS versions are: 15.1 prior to 15.1F2-S15, 15.1F5-S7, 15.1F6-S5, 15.1F7, 15.1R4-S7, 15.1R5-S2, 15.1R6; 15.1X49 prior to 15.1X49-D78, 15.1X49-D80; 15.1X53 prior to 15.1X53-D230, 15.1X53-D63, 15.1X53-D70; 16.1 prior to 16.1R3-S3, 16.1R4; 16.2 prior to 16.2R1-S3, 16.2R2; Releases prior to Junos OS 15.1 are unaffected by this vulnerability. 17.1R1, 17.2R1, and all subsequent releases have a resolution for this vulnerability.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 11/29/2022
The vulnerability described in CVE-2017-2313 represents a critical flaw in Juniper Networks' Junos OS routing software that specifically affects the rpd (routing process daemon) component. This issue manifests when devices receive specially crafted BGP UPDATE messages that trigger a crash in the routing process daemon, leading to system restarts and subsequent denial of service conditions. The vulnerability impacts a broad range of Junos OS versions across multiple release branches, making it particularly concerning for network infrastructure deployments that rely on Juniper's routing solutions. The flaw demonstrates how routing protocols, which are fundamental to internet connectivity, can be exploited to create cascading failures that disrupt network operations on a large scale.
The technical implementation of this vulnerability stems from inadequate input validation within the BGP processing module of the rpd daemon. When the routing process receives malformed or specially crafted BGP UPDATE messages, the daemon fails to properly handle the malformed data structures, resulting in memory corruption and subsequent process termination. This behavior aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read errors. The vulnerability operates at the network protocol level, making it particularly dangerous as it can be exploited remotely without requiring authentication or physical access to the device. The rpd daemon's failure to properly validate BGP message contents creates a condition where legitimate routing operations can be disrupted through malicious input.
The operational impact of CVE-2017-2313 extends far beyond simple service disruption, as repeated rpd crashes can create sustained denial of service conditions that severely impact network availability. Network administrators face the challenge of maintaining routing stability while dealing with potential exploitation through BGP peer connections, which are essential for internet connectivity in most network environments. The vulnerability affects devices that are critical infrastructure components, including core routers, edge devices, and service provider equipment that rely on BGP for route distribution and network connectivity. Organizations may experience extended outages as the rpd daemon restarts repeatedly, potentially causing routing table inconsistencies and disrupting traffic flow across affected networks. The impact is particularly severe in large-scale deployments where multiple devices may be simultaneously affected, creating cascading failures that can compromise entire network segments.
Mitigation strategies for this vulnerability should include immediate deployment of Juniper's security patches and firmware updates that address the specific BGP processing flaw in affected Junos OS versions. Network administrators should implement BGP message filtering and validation mechanisms to prevent malformed UPDATE messages from reaching the routing process daemon. The ATT&CK framework's T1071.004 technique for application layer protocol traffic filtering can be applied to monitor and block suspicious BGP messages. Additionally, implementing network segmentation and limiting BGP peer relationships to trusted sources can reduce the attack surface. Organizations should also consider deploying intrusion detection systems that can identify and alert on anomalous BGP traffic patterns that may indicate exploitation attempts. Regular monitoring of system logs for rpd daemon restart events and implementing automated alerting mechanisms will help detect potential exploitation attempts and enable rapid response to minimize service disruption.