Vulnerability identifier: #VU52230

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-2021-0238

CWE-ID: CWE-400

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 a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. When a MX Series is configured as a Broadband Network Gateway (BNG) based on Layer 2 Tunneling Protocol (L2TP), executing certain CLI command may cause the system to run out of disk space, excessive disk usage may cause other complications.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.1, 20.4 - 20.4R1, 20.2 - 20.2R2-S2, 19.4 - 19.4R3-S1, 19.4R1 - 19.4R1-S4, 19.3 - 19.3R3-S1, 19.3R1-S1, 19.3R2 - 19.3R2-S7, 18.4 - 18.4R3-S6, 18.4R1-S5, 18.4R2-S3, 18.1 - 18.1R3-S12, 19.2 - 19.2R3-S1, 19.2R1-S4, 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, 20.3 - 20.3R1-S2, 18.3 - 18.3R3-S3, 18.3R2-S3, 18.3R3-S1

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External links
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11133&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.