Resource exhaustion in Juniper Networks, Inc. products - CVE-2021-31365

Vulnerability identifier: #VU57355

CSH Severity: Low

CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-31365

CWE-ID: CWE-400

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources in an Aggregated Ethernet (AE) interface. A remote attacker on the local network can trigger resource exhaustion and perform a denial of service (DoS) attack.

EX2300
EX4300
EX3400
EX4300-MP
Junos OS

Install updates from vendor's website.

Junos OS - addressed in versions 15.1R7-S7, 16.1R7-S8, 17.1R2-S12, 17.2R3-S4, 17.3R3-S8, 17.4R2-S10, 17.4R3-S2, 18.1R3-S10, 18.1R3-S12, 18.2R2-S7, 18.2R3-S3, 18.2R3-S7, 18.3R2-S4, 18.3R3-S2, 18.3R3-S4, 18.3R3-S5, 18.4R1-S7, 18.4R2-S4, 18.4R2-S9, 18.4R3-S1, 18.4R3-S7, 18.4R3-S9, 19.1R1-S5, 19.1R2-S1, 19.1R2-S3, 19.1R3, 19.1R3-S4, 19.1R3-S6, 19.2R1-S7, 19.2R2, 19.2R3-S1, 19.2R3-S3, 19.3R2-S2, 19.3R2-S7, 19.3R3, 19.3R3-S1, 19.3R3-S3, 19.4R1-S2, 19.4R2, 19.4R3-S1, 19.4R3-S5, 20.1R1, 20.1R2-S2, 20.1R3, 20.1R3-S1, 20.2R3, 20.2R3-S2, 20.3R2, 20.3R3-S1, 20.4R1, 20.4R2-S1, 20.4R3, 21.1R2, 21.2R1

• https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11227&cat=SIRT_1&actp=LIST

• Denial of service in Juniper Networks Junos OS on EX4300 Series, EX3400 Series, EX4300-MP Series and EX2300 Series