CVE-2021-0246: Junos OS: SRX1500, SRX4100, SRX4200, SRX4600, SRX5000 Series with SPC2/SPC3: In a multi-tenant environment, a tenant host administrator may be able to jailbreak out of their network impacting other tenant networks or gather information from other networks.
First published: Thu Apr 22 2021(Updated: )
On SRX1500, SRX4100, SRX4200, SRX4600, SRX5000 Series with SPC2/SPC3, devices using tenant services on Juniper Networks Junos OS, due to incorrect default permissions 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. This issue affects: Juniper Networks Junos OS 18.3 version 18.3R1 and later versions on SRX1500, SRX4100, SRX4200, SRX4600, SRX5000 Series with SPC2; 18.3 versions prior to 18.3R3 on SRX1500, SRX4100, SRX4200, SRX4600, SRX5000 Series with SPC2; 18.4 versions prior to 18.4R2 on SRX1500, SRX4100, SRX4200, SRX4600, SRX5000 Series with SPC2/SPC3; 19.1 versions prior to 19.1R2 on SRX1500, SRX4100, SRX4200, SRX4600, SRX5000 Series with SPC2/SPC3. This issue does not affect: Juniper Networks Junos OS versions prior to 18.3R1.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper JUNOS | =18.3 | |
| Juniper JUNOS | =18.3-r1 | |
| Juniper JUNOS | =18.3-r1-s1 | |
| Juniper JUNOS | =18.3-r1-s2 | |
| Juniper JUNOS | =18.3-r1-s3 | |
| Juniper JUNOS | =18.3-r1-s4 | |
| Juniper JUNOS | =18.3-r1-s5 | |
| Juniper JUNOS | =18.3-r1-s6 | |
| Juniper JUNOS | =18.3-r2 | |
| Juniper JUNOS | =18.3-r2-s1 | |
| Juniper JUNOS | =18.3-r2-s2 | |
| Juniper JUNOS | =18.3-r2-s3 | |
| Juniper JUNOS | =18.3-r2-s4 | |
| Juniper JUNOS | =18.4 | |
| Juniper JUNOS | =18.4-r1 | |
| Juniper JUNOS | =18.4-r1-s1 | |
| Juniper JUNOS | =18.4-r1-s2 | |
| Juniper JUNOS | =18.4-r1-s3 | |
| Juniper JUNOS | =18.4-r1-s4 | |
| Juniper JUNOS | =18.4-r1-s5 | |
| Juniper JUNOS | =18.4-r1-s6 | |
| Juniper JUNOS | =18.4-r1-s7 | |
| Juniper JUNOS | =19.1 | |
| Juniper JUNOS | =19.1-r1 | |
| Juniper JUNOS | =19.1-r1-s1 | |
| Juniper JUNOS | =19.1-r1-s2 | |
| Juniper JUNOS | =19.1-r1-s3 | |
| Juniper JUNOS | =19.1-r1-s4 | |
| Juniper JUNOS | =19.1-r1-s5 | |
| Juniper Srx1500 | ||
| Juniper Srx4100 | ||
| Juniper Srx4200 | ||
| Juniper Srx4600 | ||
| Juniper Srx5400 | ||
| Juniper Srx5600 | ||
| Juniper Srx5800 |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS: 18.3R3, 18.4R2, 19.1R2, 19.2R1, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is CVE-2021-0246?
CVE-2021-0246 is a vulnerability on SRX1500, SRX4100, SRX4200, SRX4600, and SRX5000 Series devices using tenant services on Juniper Networks Junos OS.
How severe is CVE-2021-0246?
CVE-2021-0246 has a severity rating of 7.3 (high).
Which software versions are affected by CVE-2021-0246?
CVE-2021-0246 affects Juniper JUNOS versions 18.3, 18.3-r1, 18.3-r1-s1, 18.3-r1-s2, 18.3-r1-s3, 18.3-r1-s4, 18.3-r1-s5, 18.3-r1-s6, 18.3-r2, 18.3-r2-s1, 18.3-r2-s2, 18.3-r2-s3, 18.3-r2-s4, 18.4, 18.4-r1, 18.4-r1-s1, 18.4-r1-s2, 18.4-r1-s3, 18.4-r1-s4, 18.4-r1-s5, 18.4-r1-s6, 18.4-r1-s7, 19.1, 19.1-r1, 19.1-r1-s1, 19.1-r1-s2, 19.1-r1-s3, 19.1-r1-s4, and 19.1-r1-s5.
How can CVE-2021-0246 be fixed?
To fix CVE-2021-0246, users should install the necessary updates or patches provided by Juniper Networks.
Where can I find more information about CVE-2021-0246?
More information about CVE-2021-0246 can be found on the Juniper Networks Knowledge Base article: https://kb.juniper.net/JSA11139
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- canonical/juniper junos
- version/juniper junos/18.3
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- version/juniper junos/18.3-r2-s4
- version/juniper junos/18.4
- version/juniper junos/18.4-r1
- version/juniper junos/18.4-r1-s1
- version/juniper junos/18.4-r1-s2
- version/juniper junos/18.4-r1-s3
- version/juniper junos/18.4-r1-s4
- version/juniper junos/18.4-r1-s5
- version/juniper junos/18.4-r1-s6
- version/juniper junos/18.4-r1-s7
- version/juniper junos/19.1
- version/juniper junos/19.1-r1
- version/juniper junos/19.1-r1-s1
- version/juniper junos/19.1-r1-s2
- version/juniper junos/19.1-r1-s3
- version/juniper junos/19.1-r1-s4
- version/juniper junos/19.1-r1-s5
- canonical/juniper srx1500
- canonical/juniper srx4100
- canonical/juniper srx4200
- canonical/juniper srx4600
- canonical/juniper srx5400
- canonical/juniper srx5600
- canonical/juniper srx5800