Vulnerability identifier: #VU52306

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-0224

CWE-ID: CWE-20

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Juniper Networks, Inc.

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in the Access Node Control Protocol daemon (ANCPD) when hitting maximum-discovery-table-entries limit. A remote attacker on the local network can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 17.3 - 17.3R3-S11, 17.4R1 - 17.4R2-S12, 17.4R2-S9, 18.1R1 - 18.1R3-S12, 18.2R1 - 18.2R3-S7, 18.3R1 - 18.3R3-S4, 18.3R3-S1, 18.3R2-S3, 18.4R1 - 18.4R3-S7, 18.4R2-S3, 18.4R1-S5, 19.1R - 19.1R3-S3, 19.1R1-S4, 19.2R1 - 19.2R3-S1, 19.2R1-S4, 19.3R2 - 19.3R2-S5, 19.3R1 - 19.3R3, 19.3R1-S1, 19.4R2 - 19.4R3, 19.4R1 - 19.4R1-S3, 20.1 - 20.1R1-S4, 20.2 - 20.2R1-S3, 20.3 - 20.3R1-S2

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External links
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11119&cat=SIRT_1&actp=LIST

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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.