CVE-2021-0271

Junos OS: EX2200-C Series, EX3200 Series, EX3300 Series, EX4200 Series, EX4500 Series, EX4550 Series, EX6210 Series, EX8208 Series, EX8216 Series: Receipt of a crafted ARP packet by an adjacent attacker will cause the sfid process to core.

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.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: Junos OS: 12.3R12-S17, 15.1R7-S8, and all subsequent releases.

Workaround:

  • There are no known workarounds for this issue.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.08%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
https://kb.juniper.net/JSA11162 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-0271?
CVE-2021-0271 has been scored as a medium severity vulnerability.
How to fix CVE-2021-0271?
To fix CVE-2021-0271: The following software releases have been updated to resolve this specific issue: Junos OS: 12.3R12-S17, 15.1R7-S8, and all subsequent releases.
Is CVE-2021-0271 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-0271 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-0271?
CVE-2021-0271 affects Juniper Networks Junos OS.
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