Denial of service in Junos OS Ethernet interface frame processing



Published: 2021-07-15
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-0290
CWE-ID CWE-703
Exploitation vector Local network
Public exploit N/A
Vulnerable software
Subscribe 		Juniper Junos OS
Operating systems & Components / Operating system

Vendor Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Check or Handling of Exceptional Conditions

EUVDB-ID: #VU54914

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 - Improper Check or Handling of Exceptional Conditions

Exploit availability: No

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 - 19.4

External links

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


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.



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