CVE-2024-30386: Junos OS and Junos OS Evolved: In a EVPN-VXLAN scenario state changes on adjacent systems can cause an l2ald process crash
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.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2024-30386?
CVE-2024-30386 has been classified as a high-severity vulnerability due to its potential to cause a Denial-of-Service (DoS).
How do I fix CVE-2024-30386?
To mitigate CVE-2024-30386, it is recommended to upgrade to the latest patched versions of Junos OS or Junos OS Evolved as specified by Juniper Networks.
Who is affected by CVE-2024-30386?
CVE-2024-30386 affects various versions of Juniper Networks Junos OS and Junos OS Evolved up to 22.4.
What is the impact of CVE-2024-30386?
The impact of CVE-2024-30386 is that it allows an unauthenticated adjacent attacker to crash the Layer 2 Address Learning Daemon, resulting in a Denial-of-Service.
How can I determine if my system is vulnerable to CVE-2024-30386?
You can determine if your system is vulnerable to CVE-2024-30386 by checking if you are using an affected version of Junos OS or Junos OS Evolved prior to the updates released by Juniper Networks.