Vulnerability identifier: #VU52227

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-0230

CWE-ID: CWE-401

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description
The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak On Juniper Networks Junos OS platforms with link aggregation (lag) configured. A local user can execute any operation that fetches Aggregated Ethernet (AE) interface statistics, including but not limited to SNMP GET requests, and trigger a slow kernel memory leak.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.3 - 20.3R1-S1, 20.2 - 20.2R2-S3, 20.1 - 20.1R2-S2, 18.2 - 18.2R3-S6, 17.4 - 17.4R3-S4, 17.4R2-S9, 19.1 - 19.1R3-S3, 19.1R1-S4, 17.3 - 17.3R3-S10, 20.4, 19.2 - 19.2R1-S5, 19.2R1-S4, 18.4 - 18.4R3-S5, 18.4R1-S5, 18.4R2-S3, 18.3 - 18.3R3-S3, 18.3R2-S3, 18.3R3-S1, 19.4 - 19.4R3, 19.4R1 - 19.4R1-S4, 19.3 - 19.3R3, 19.3R1-S1, 19.3R2 - 19.3R2-S7

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External links
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11125&cat=SIRT_1&actp=LIST

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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