CVE-2024-30380 Information

Description

An Improper Handling of Exceptional Conditions vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a Denial of Service (DoS) which causes the l2cpd process to crash by sending a specific TLV.

The l2cpd process is responsible for layer 2 control protocols such as STP RSTP MSTP VSTP ERP and LLDP.  The impact of the l2cpd crash is reinitialization of STP protocols (RSTP MSTP or VSTP) and MVRP and ERP leading to a Denial of Service.  Continued receipt and processing of this specific TLV will create a sustained Denial of Service (DoS) condition. This issue affects:

Junos OS: all versions before 20.4R3-S9 from 21.2 before 21.2R3-S7 from 21.3 before 21.3R3-S5 from 21.4 before 21.4R3-S4 from 22.1 before 22.1R3-S4 from 22.2 before 22.2R3-S2 from 22.3 before 22.3R2-S2 22.3R3-S1 from 22.4 before 22.4R2-S2 22.4R3 from 23.2 before 23.2R1-S1 23.2R2;

Junos OS Evolved: all versions before 21.2R3-S7

from 21.3 before 21.3R3-S5-EVO from 21.4 before 21.4R3-S5-EVO from 22.1 before 22.1R3-S4-EVO from 22.2 before 22.2R3-S2-EVO from 22.3 before 22.3R2-S2-EVO 22.3R3-S1-EVO from 22.4 before 22.4R2-S2-EVO 22.4R3-EVO from 23.2 before 23.2R1-S1-EVO 23.2R2-EVO.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://supportportal.juniper.net/JSA79171 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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5