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



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-31365
CWE-ID CWE-400
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 Juniper Junos OS
Operating systems & Components / Operating system

EX4300
Hardware solutions / Routers & switches, VoIP, GSM, etc

EX3400
Hardware solutions / Routers & switches, VoIP, GSM, etc

EX4300-MP
Hardware solutions / Routers & switches, VoIP, GSM, etc

EX2300
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Resource exhaustion

EUVDB-ID: #VU57355

Risk: Low

CVSSv4.0: 4.9 [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/E:U/U:Clear]

CVE-ID: CVE-2021-31365

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 15.1R - 21.1R1

EX4300: All versions

EX3400: All versions

EX4300-MP: All versions

EX2300: All versions

CPE2.3 External links

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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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