Description (CNA)
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 an unauthenticated attacker with an established BGP session to cause a Denial of Service (DoS). In a BGP multipath scenario, when one of the contributing routes is flapping often and rapidly, rpd may crash. As this crash depends on whether a route is a contributing route, and on the internal timing of the events triggered by the flap this vulnerability is outside the direct control of a potential attacker. This issue affects: Juniper Networks Junos OS 19.2 versions prior to 19.2R3-S6; 20.2 versions prior to 20.2R3-S4; 20.3 versions prior to 20.3R3-S3; 20.4 versions prior to 20.4R3-S4; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R2; 21.3 versions prior to 21.3R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S4-EVO; 21.1-EVO version 21.1R1-EVO and later versions; 21.2-EVO versions prior to 21.2R2-EVO; 21.3-EVO versions prior to 21.3R2-EVO. This issue does not affect: Juniper Networks Junos OS versions 19.2 versions prior to 19.2R2, 19.3R1 and above prior to 20.2R1. Juniper Networks Junos OS Evolved versions prior to 20.2R1-EVO.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Juniper Networks / Junos OS | unaffected 19.2 before 19.2R2; unaffected 19.3R1 before 19.3*; unaffected 19.4R1 before 19.4*; unaffected 20.1R1 before 20.1*; affected 20.2 before 20.2R3-S4; affected 20.3 before 20.3R3-S3; affected 20.4 before 20.4R3-S4; affected 21.1 before 21.1R3; affected 21.2 before 21.2R2; affected 21.3 before 21.3R2 |
| Juniper Networks / Junos OS Evolved | affected unspecified before 20.4R3-S4-EVO; unaffected unspecified before 20.2R1-EVO; affected 21.1R1-EVO before 21.1-EVO*; affected 21.2-EVO before 21.2R2-EVO; affected 21.3-EVO before 21.3R2-EVO |
CWE
CWE-367
References
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.