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Juniper Junos OS: 2020-10 Security Bulletin: Junos OS: EX4300 Series: High CPU load due to receipt of specific IPv4 packets (JSA11067) (CVE-2020-1670)

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Juniper Junos OS: 2020-10 Security Bulletin: Junos OS: EX4300 Series: High CPU load due to receipt of specific IPv4 packets (JSA11067) (CVE-2020-1670)

Severity
3
CVSS
(AV:A/AC:L/Au:N/C:N/I:N/A:P)
Published
10/15/2020
Created
10/16/2020
Added
10/15/2020
Modified
03/21/2022

Description

On Juniper Networks EX4300 Series, receipt of a stream of specific IPv4 packets can cause Routing Engine (RE) high CPU load, which could lead to network protocol operation issue and traffic interruption. This specific packets can originate only from within the broadcast domain where the device is connected. This issue occurs when the packets enter to the IRB interface. Only IPv4 packets can trigger this issue. IPv6 packets cannot trigger this issue. This issue affects Juniper Networks Junos OS on EX4300 series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2; 18.1 versions prior to 18.1R3-S10; 18.2 versions prior to 18.2R3-S4; 18.3 versions prior to 18.3R2-S4, 18.3R3-S2; 18.4 versions prior to 18.4R2-S4, 18.4R3-S2; 19.1 versions prior to 19.1R2-S2, 19.1R3-S1; 19.2 versions prior to 19.2R1-S5, 19.2R2-S1, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2; 20.1 versions prior to 20.1R1-S3, 20.1R2.

Solution(s)

  • juniper-junos-os-upgrade-latest

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