| Assigner | juniper |
| Reserved | 2024-03-26 |
| Published | 2024-04-12 |
| Updated | 2024-06-04 |
Description
A Use-After-Free 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 l2ald to crash leading to a Denial-of-Service (DoS). In an EVPN-VXLAN scenario, when state updates are received and processed by the affected system, the correct order of some processing steps is not ensured, which can lead to an l2ald crash and restart. Whether the crash occurs depends on system internal timing which is outside the attackers control. This issue affects: Junos OS: * All versions before 20.4R3-S8, * 21.2 versions before 21.2R3-S6, * 21.3 versions before 21.3R3-S5, * 21.4 versions before 21.4R3-S4, * 22.1 versions before 22.1R3-S3, * 22.2 versions before 22.2R3-S1, * 22.3 versions before 22.3R3,, * 22.4 versions before 22.4R2; Junos OS Evolved: * All versions before 20.4R3-S8-EVO, * 21.2-EVO versions before 21.2R3-S6-EVO, * 21.3-EVO versions before 21.3R3-S5-EVO, * 21.4-EVO versions before 21.4R3-S4-EVO, * 22.1-EVO versions before 22.1R3-S3-EVO, * 22.2-EVO versions before 22.2R3-S1-EVO, * 22.3-EVO versions before 22.3R3-EVO, * 22.4-EVO versions before 22.4R2-EVO.
| CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | |
| 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 |
Problem types
Denial-of-Service (DoS)
Product status
Any version before 20.4R3-S8
21.2 before 21.2R3-S6
21.3 before 21.3R3-S5
21.4 before 21.4R3-S4
22.1 before 22.1R3-S3
22.2 before 22.2R3-S1
22.3 before 22.3R3
22.4 before 22.4R2
Any version before 20.4R3-S8-EVO
21.2-EVO before 21.2R3-S6-EVO
21.3-EVO before 21.3R3-S5-EVO
21.4-EVO before 21.4R3-S4-EVO
22.1-EVO before 22.1R3-S3-EVO
22.2-EVO before 22.2R3-S1-EVO
22.3-EVO before 22.3R3-EVO
22.4-EVO before 22.4R2-EVO
References
http://supportportal.juniper.net/JSA79184
https://www.first.org/cvss/calculator/4.0#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
