Vulnerability identifier: #VU54914

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-0290

CWE-ID: CWE-703

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 6.1, 18.2 - 18.2R3-S7, 17.4 - 17.4R3-S4, 17.4R2-S9, 18.1 - 18.1R3-S9, 17.3 - 17.3R3-S7, 19.1 - 19.1R2-S3, 19.1R1-S4, 19.2 - 19.2R1-S9, 18.3 - 18.3R3, 18.3R2-S3, 19.4, 18.4 - 18.4R2-S10, 18.4R1-S5, 19.3 - 19.3R1, 19.3R1-S1, 19.2R1-S4, 17.2 - 17.2R3-S2

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External links
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11192&cat=SIRT_1&actp=LIST

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.