Improper Check or Handling of Exceptional Conditions in Junos OS - CVE-2021-0290
Published: July 15, 2021
Vulnerability identifier: #VU54914
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-0290
CWE-ID: CWE-703
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper handling of exceptional conditions in Ethernet interface frame processing. A remote attacker on the local network can send specially crafted frames over the local Ethernet segment, causing the interface to go into a down state, resulting in a Denial of Service (DoS) condition.
This issue is platform-specific and affects the following platforms and line cards:
- MPC7E/8E/9E and MPC10E on MX240, MX480, MX960, MX2008, MX2010, and MX2020
- MX204, MX10003, MX10008, MX10016
- EX9200, EX9251
- SRX4600
Affected software
Junos OS
How to mitigate CVE-2021-0290
Install updates from vendor's website.
Junos OS - addressed in versions 6.1R7-S7, 17.2R3-S3, 17.3R3-S8, 17.4R2-S11, 17.4R3-S1, 17.4R3-S5, 18.1R3-S10, 18.2R3-S3, 18.2R3-S8, 18.3R3-S1, 18.4R2-S3, 18.4R3, 19.1R2-S1, 19.1R3, 19.2R1-S3, 19.2R2, 19.3R2, 19.4R1