CVE-2024-39517

Junos OS and Junos OS Evolved: Upon processing specific L2 traffic, rpd can hang in devices with EVPN/VXLAN configured

State: Published
Severity: 7.1 High
Published: Jul 10, 2024
Updated: Aug 2, 2024
Reserved: Jun 25, 2024

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) on Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause Denial of Service (DoS).

In an EVPN/VXLAN scenario, when a high amount specific Layer 2 packets are processed by the device, it can cause the Routing Protocol Daemon (rpd) to utilize all CPU resources which causes the device to hang. A manual restart of the rpd is required to restore services.

This issue affects both IPv4 and IPv6 implementations. This issue affects Junos OS: All versions earlier than 21.4R3-S7; 22.1 versions earlier than 22.1R3-S5; 22.2 versions earlier than 22.2R3-S3; 22.3 versions earlier than 22.3R3-S3; 22.4 versions earlier than 22.4R3-S2; 23.2 versions earlier than 23.2R2; 23.4 versions earlier than 23.4R1-S1.

Junos OS Evolved: All versions earlier than 21.4R3-S7-EVO; 22.1-EVO versions earlier than 22.1R3-S5-EVO; 22.2-EVO versions earlier than 22.2R3-S3-EVO; 22.3-EVO versions earlier than 22.3R3-S3-EVO; 22.4-EVO versions earlier than 22.4R3-S2-EVO; 23.2-EVO versions earlier than 23.2R2-EVO; 23.4-EVO versions earlier than 23.4R1-S1-EVO, 23.4R2-EVO.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L	juniper
3.1	6.5 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	juniper

Weaknesses

CWE-754 Improper Check for Unusual or Exceptional Conditions

Affected Products

Product	Versions
Junos OSJuniper Networks	before 21.2R3-S8Affected 21.4 to before 21.4R3-S7Affected 22.1 to before 22.1R3-S5Affected 22.2 to before 22.2R3-S3Affected 22.3 to before 22.3R3-S3Affected 22.4 to before 22.4R3-S2Affected 23.2 to before 23.2R2Affected 23.4 to before 23.4R1-S1Affected
Junos OS EvolvedJuniper Networks	before 21.2R3-S8-EVOAffected 21.4-EVO to before 21.4R3-S7-EVOAffected 22.1-EVO to before 22.1R3-S5-EVOAffected 22.2-EVO to before 22.2R3-S3-EVOAffected 22.3-EVO to before 22.3R3-S3-EVOAffected 22.4-EVO to before 22.4R3-S2-EVOAffected 23.2-EVO to before 23.2R2-EVOAffected 23.4-EVO to before 23.4R1-S1-EVO, 23.4R2-EVOAffected

References

https://supportportal.juniper.net/JSA79175vendor-advisory

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