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MEDIUM · 6.5

CVE-2021-0271

A Double Free vulnerability in the software forwarding interface daemon (sfid) process of Juniper Networks Junos OS allows an adjacently-connected attacker to cause a Denial of Service (DoS) by sendin...

Vulnerability Description

A Double Free vulnerability in the software forwarding interface daemon (sfid) process of Juniper Networks Junos OS allows an adjacently-connected attacker to cause a Denial of Service (DoS) by sending a crafted ARP packet to the device. Continued receipt and processing of the crafted ARP packets will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on EX2200-C Series, EX3200 Series, EX3300 Series, EX4200 Series, EX4500 Series, EX4550 Series, EX6210 Series, EX8208 Series, EX8216 Series. 12.3 versions prior to 12.3R12-S17; 15.1 versions prior to 15.1R7-S8. This issue only affects the listed Marvell-chipset based EX Series devices. No other products or platforms are affected.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
JuniperJunos12.3
JuniperEx2200-C-
JuniperEx3200-
JuniperEx3300-
JuniperEx4200-
JuniperEx4500-
JuniperEx4550-
JuniperEx6210-
JuniperEx8208-
JuniperEx8216-

Related Weaknesses (CWE)

CWE-415

References

FAQ

What is CVE-2021-0271?

CVE-2021-0271 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A Double Free vulnerability in the software forwarding interface daemon (sfid) process of Juniper Networks Junos OS allows an adjacently-connected attacker to cause a Denial of Service (DoS) by sendin...

How severe is CVE-2021-0271?

CVE-2021-0271 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-2021-0271?

Check the references section above for vendor advisories and patch information. Affected products include: Juniper Junos, Juniper Ex2200-C, Juniper Ex3200, Juniper Ex3300, Juniper Ex4200.