CVE-2022-22220

Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS versions prior to 18.4R2-S10, 18.4R3-S10 Juniper Networks Junos OS versions 19.1 prior to 19.1R3-S7 Juniper Networks Junos OS versions 19.2 prior to 19.2R1-S8, 19.2R3-S4 Juniper Networks Junos OS versions 19.4 prior to 19.4R3-S8 Juniper Networks Junos OS versions 20.2 prior to 20.2R3-S3 Juniper Networks Junos OS versions 20.3 prior to 20.3R3-S2 Juniper Networks Junos OS versions 20.4 prior to 20.4R3 Juniper Networks Junos OS versions 21.1 prior to 21.1R2 Juniper Networks Junos OS Evolved versions prior to 20.4R2-EVO Juniper Networks Junos OS Evolved versions 21.1 prior to 21.1R2-EVO

Description A Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based unauthenticated attacker to cause a Denial of Service (DoS). When a BGP flow route with redirect IP extended community is received, and the reachability to the next-hop of the corresponding redirect IP is flapping, the rpd process might crash. This issue also affects Route-Reflectors unless 'routing-options flow firewall-install-disable' is configured.

Recommendations For Juniper Networks Junos OS versions prior to 18.4R2-S10, 18.4R3-S10, update to version 18.4R2-S10 or later. For Juniper Networks Junos OS versions 19.1 prior to 19.1R3-S7, update to version 19.1R3-S7 or later. For Juniper Networks Junos OS versions 19.2 prior to 19.2R1-S8, 19.2R3-S4, update to version 19.2R1-S8 or later. For Juniper Networks Junos OS versions 19.4 prior to 19.4R3-S8, update to version 19.4R3-S8 or later. For Juniper Networks Junos OS versions 20.2 prior to 20.2R3-S3, update to version 20.2R3-S3 or later. For Juniper Networks Junos OS versions 20.3 prior to 20.3R3-S2, update to version 20.3R3-S2 or later. For Juniper Networks Junos OS versions 20.4 prior to 20.4R3, update to version 20.4R3 or later. For Juniper Networks Junos OS versions 21.1 prior to 21.1R2, update to version 21.1R2 or later. For Juniper Networks Junos OS Evolved versions prior to 20.4R2-EVO, update to version 20.4R2-EVO or later. For Juniper Networks Junos OS Evolved versions 21.1 prior to 21.1R2-EVO, update to version 21.1R2-EVO or later. As a temporary workaround, consider configuring 'routing-options flow firewall-install-disable' to prevent the issue on Route-Reflectors.