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AUSCERT External Security Bulletin Redistribution
ESB-2021.1264
JSA11139 - 2021-04 Security Bulletin: Junos OS: SRX1500, SRX4100, SRX4200,
SRX4600, SRX5000 Series with SPC2/SPC3: Multiple vulnerabilities
15 April 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Junos OS: SRX1500
Junos OS: SRX4100
Junos OS: SRX4200
Junos OS: SRX4600
Junos OS: SRX5000
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Access Confidential Data -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-0246
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11139
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2021-04 Security Bulletin: 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. (CVE-2021-0246)
Article ID : JSA11139
Last Updated: 14 Apr 2021
Version : 3.0
Product Affected:
This issue affects Junos OS 18.3, 18.4, 19.1. Affected platforms: SRX1500,
SRX4100, SRX4200, SRX4600, SRX5000 Series with SPC2, SRX5000 Series with SPC2/
SPC3.
Problem:
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:
o 18.3 version 18.3R1 and later versions on SRX1500, SRX4100, SRX4200,
SRX4600, SRX5000 Series with SPC2;
o 18.3 versions prior to 18.3R3 on SRX1500, SRX4100, SRX4200, SRX4600,
SRX5000 Series with SPC2;
o 18.4 versions prior to 18.4R2 on SRX1500, SRX4100, SRX4200, SRX4600,
SRX5000 Series with SPC2/SPC3;
o 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.
Only one tenant configuration and login class must be enabled for this issue to
be seen between the tenant and root or multiple tenants, for example:
system login class "tenant class" tenant "tenant"
system login user "user" uid "id"
system login user "user" class "tenant class"
tenants "tenant" interfaces
tenants "tenant" routing-instances
system security-profile "tenant profile" policy maximum "number"
system security-profile "tenant profile" zone maximum "number"
system security-profile "tenant profile" tenant "tenant"
tenants "tenant" security policies default-policy deny-all
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was seen during production usage.
This issue has been assigned CVE-2021-0246 .
Solution:
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.
This issue is being tracked as 1422058 .
Workaround:
There are no known workarounds for this issue
Implementation:
Software releases or updates are available for download at https://
support.juniper.net/support/downloads/
Modification History:
2021-04-14: Initial Publication.
CVSS Score:
7.3 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:L)
Severity Level:
High
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
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NOTE: This is only the original release of the security bulletin. It may
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
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On call after hours for member emergencies only.
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