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PUBLISHED

CVE-2024-30402

Junos OS and Junos OS Evolved: The l2ald crashes on receiving telemetry messages from a specific subscription

Reserved:2024-03-26
Published:2024-04-12
Updated:2024-05-16

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When telemetry requests are sent to the device, and the Dynamic Rendering Daemon (drend) is suspended, the l2ald crashes and restarts due to factors outside the attackers control. Repeated occurrences of these events causes a sustained DoS condition. This issue affects: Junos OS: * All versions earlier than 20.4R3-S10; * 21.2 versions earlier than 21.2R3-S7; * 21.4 versions earlier than 21.4R3-S5; * 22.1 versions earlier than 22.1R3-S4; * 22.2 versions earlier than 22.2R3-S3; * 22.3 versions earlier than 22.3R3-S1; * 22.4 versions earlier than 22.4R3; * 23.2 versions earlier than 23.2R1-S2, 23.2R2. Junos OS Evolved: * All versions earlier than 21.4R3-S5-EVO; * 22.1-EVO versions earlier than 22.1R3-S4-EVO; * 22.2-EVO versions earlier than 22.2R3-S3-EVO; * 22.3-EVO versions earlier than 22.3R3-S1-EVO; * 22.4-EVO versions earlier than 22.4R3-EVO; * 23.2-EVO versions earlier than 23.2R2-EVO.



MEDIUM: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
HIGH: 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

Problem types

CWE-754 Improper Check for Unusual or Exceptional Conditions

Denial of Service (DoS)

Product status

Default status
unaffected

20.4 before 20.4R3-S10
affected

21.2 before 21.2R3-S7
affected

21.4 before 21.4R3-S5
affected

22.1 before 22.1R3-S4
affected

22.2 before 22.2R3-S3
affected

22.3 before 22.3R3-S1
affected

22.4 before 22.4R3
affected

23.2 before 23.2R1-S2, 23.2R2
affected

Default status
unaffected

21.4-EVO before 21.4R3-S5-EVO
affected

22.1-EVO before 22.1R3-S4-EVO
affected

22.2-EVO before 22.2R3-S3-EVO
affected

22.3-EVO before 22.3R3-S1-EVO
affected

22.4-EVO before 22.4R3-EVO
affected

23.2-EVO before 23.2R2-EVO
affected

References

https://supportportal.juniper.net/JSA79180 vendor-advisory

https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L technical-description

cve.org CVE-2024-30402

nvd.nist.gov CVE-2024-30402

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