Security restrictions bypass in multi-tenant environments in Juniper Junos OS



Published: 2021-04-16
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-0235
CWE ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
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Juniper Junos OS
Operating systems & Components / Operating system

Vendor

Security Advisory

This security advisory describes one low risk vulnerability.

1) Security restrictions bypass

Risk: Low

CVSSv3.1: 6.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-0235

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to system does not properly impose security restrictions in a multi-tenant environment. On SRX1500, SRX4100, SRX4200, SRX4600, SRX5000 Series with SPC2/SPC3, vSRX Series devices using tenant services on Juniper Networks Junos OS, due to incorrect permission scheme assigned to tenant system administrators, a tenant system administrator may inadvertently send their network traffic to one or more tenants while concurrently modifying the overall device system traffic management, affecting all tenants and the service provider. Further, a tenant may inadvertently receive traffic from another tenant.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: before 19.2R1-S6, 19.2R3-S2, 19.3R3-S2, 19.4R2-S4, 19.4R3-S2, 20.1R2, 20.1R3, 20.2R2-S1, 20.2R3, 20.3R1-S2, 20.3R2, 20.4R1

CPE External links

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11130&cat=SIRT_1&actp=LIST

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.



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