CVE-2024-39557

Severity CVSS v4.0:
HIGH
Type:
CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
10/07/2024
Last modified:
07/02/2025

Description

An Uncontrolled Resource Consumption vulnerability in the <br /> <br /> Layer 2 Address Learning Daemon (l2ald)<br /> <br /> of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a memory leak, eventually exhausting all system memory, leading to a system crash and Denial of Service (DoS).<br /> <br /> Certain MAC table updates cause a small amount of memory to leak.  Once memory utilization reaches its limit, the issue will result in a system crash and restart.<br /> <br /> To identify the issue, execute the CLI command:<br /> <br /> user@device&gt; show platform application-info allocations app l2ald-agent<br /> EVL Object Allocation Statistics:<br /> <br /> Node   Application     Context Name                               Live   Allocs   Fails     Guids<br /> re0   l2ald-agent               net::juniper::rtnh::L2Rtinfo       1069096 1069302   0         1069302<br /> re0   l2ald-agent               net::juniper::rtnh::NHOpaqueTlv     114     195       0         195<br /> <br /> <br /> <br /> This issue affects Junos OS Evolved: <br /> <br /> <br /> * All versions before 21.4R3-S8-EVO,<br /> <br /> * from 22.2-EVO before 22.2R3-S4-EVO, <br /> * from 22.3-EVO before 22.3R3-S3-EVO, <br /> * from 22.4-EVO before 22.4R3-EVO, <br /> * from 23.2-EVO before 23.2R2-EVO.

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:* 21.4 (excluding)
cpe:2.3:o:juniper:junos_os_evolved:21.4:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s6:*:*:*:*:*:*