Vulnerability Description
Improper Handling of Exceptional Conditions in Ethernet interface frame processing of Juniper Networks Junos OS allows an attacker to 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. The interface does not recover on its own and the FPC must be reset manually. Continued receipt and processing of these frames will create a sustained 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 No other products or platforms are affected by this vulnerability. An indication of this issue occurring can be seen in the system log messages, as shown below: user@host> show log messages | match "Failed to complete DFE tuning" fpc4 smic_phy_dfe_tuning_state: et-4/1/6 - Failed to complete DFE tuning (count 3) and interface will be in a permanently down state: user@host> show interfaces et-4/1/6 terse Interface Admin Link Proto Local Remote et-4/1/6 up down et-4/1/6.0 up down aenet --> ae101.0 This issue affects Juniper Networks Junos OS: 16.1 versions prior to 16.1R7-S7 on MX Series; 17.1R1 and later versions prior to 17.2R3-S3 on MX Series; 17.3 versions prior to 17.3R3-S8 on MX Series; 17.4 versions prior to 17.4R2-S11, 17.4R3-S1 on MX Series, SRX4600; 18.1 versions prior to 18.1R3-S10 on MX Series, EX9200 Series, SRX4600; 18.2 versions prior to 18.2R3-S3 on MX Series, EX9200 Series, SRX4600; 18.3 versions prior to 18.3R3-S1 on MX Series, EX9200 Series, SRX4600; 18.4 versions prior to 18.4R2-S3, 18.4R3 on MX Series, EX9200 Series, SRX4600; 19.1 versions prior to 19.1R2-S1, 19.1R3 on MX Series, EX9200 Series, SRX4600; 19.2 versions prior to 19.2R1-S3, 19.2R2 on MX Series, EX9200 Series, SRX4600; 19.3 versions prior to 19.3R2 on MX Series, EX9200 Series, SRX4600. This issue does not affect Juniper Networks Junos OS versions prior to 16.1R1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Juniper | Junos | 16.1 |
| Juniper | Mx10 | - |
| Juniper | Mx10000 | - |
| Juniper | Mx10003 | - |
| Juniper | Mx10008 | - |
| Juniper | Mx10016 | - |
| Juniper | Mx104 | - |
| Juniper | Mx150 | - |
| Juniper | Mx2008 | - |
| Juniper | Mx2010 | - |
| Juniper | Mx2020 | - |
| Juniper | Mx204 | - |
| Juniper | Mx240 | - |
| Juniper | Mx40 | - |
| Juniper | Mx480 | - |
| Juniper | Mx5 | - |
| Juniper | Mx80 | - |
| Juniper | Mx960 | - |
| Juniper | Srx4600 | - |
| Juniper | Ex9200 | - |
Related Weaknesses (CWE)
References
- https://kb.juniper.net/JSA11192Vendor Advisory
- https://kb.juniper.net/JSA11192Vendor Advisory
FAQ
What is CVE-2021-0290?
CVE-2021-0290 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Improper Handling of Exceptional Conditions in Ethernet interface frame processing of Juniper Networks Junos OS allows an attacker to send specially crafted frames over the local Ethernet segment, cau...
How severe is CVE-2021-0290?
CVE-2021-0290 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-0290?
Check the references section above for vendor advisories and patch information. Affected products include: Juniper Junos, Juniper Mx10, Juniper Mx10000, Juniper Mx10003, Juniper Mx10008.