CVE-2024-39560

An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a logically adjacent downstream RSVP neighbor to cause kernel memory exhaustion, leading to a kernel crash, resulting in a Denial of Service (DoS).<br /> <br /> The kernel memory leak and eventual crash will be seen when the downstream RSVP neighbor has a persistent error which will not be corrected.<br /> <br /> System kernel memory can be monitored through the use of the &amp;#39;show system kernel memory&amp;#39; command as shown below:<br /> <br /> user@router&gt; show system kernel memory   <br /> Real memory total/reserved: 4130268/ 133344 Kbytes<br /> kmem map free: 18014398509110220 Kbytes<br /> <br /> This issue affects:<br /> Junos OS:<br /> <br /> <br /> * All versions before 20.4R3-S9,<br /> * All versions of 21.2,<br /> * from 21.4 before 21.4R3-S5,<br /> * from 22.1 before 22.1R3-S5,<br /> * from 22.2 before 22.2R3-S3,<br /> * from 22.3 before 22.3R3-S2,<br /> * from 22.4 before 22.4R3,<br /> * from 23.2 before 23.2R2;<br /> <br /> <br /> Junos OS Evolved:<br /> <br /> <br /> * All versions before 21.4R3-S5-EVO,<br /> * from 22.1-EVO before 22.1R3-S5-EVO, <br /> * from 22.2-EVO before 22.2R3-S3-EVO, <br /> * from 22.3-EVO before 22.3R3-S2-EVO, <br /> * from 22.4-EVO before 22.4R3-EVO, <br /> * from 23.2-EVO before 23.2R2-EVO.