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AUSCERT External Security Bulletin Redistribution
ESB-2020.3569
JSA11079 - 2020-10 Security Bulletin: Junos OS: SRX1500, vSRX, SRX4K,
NFX150: Denial of service vulnerability executing local CLI
command (CVE-2020-1682)
16 October 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Junos OS
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-1682
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11079
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2020-10 Security Bulletin: Junos OS: SRX1500, vSRX, SRX4K, NFX150: Denial of service vulnerability executing local CLI command (CVE-2020-1682)
Article ID : JSA11079
Last Updated: 14 Oct 2020
Version : 3.0
Product Affected:
This issue affects Junos OS 15.1X49, 17.4, 18.1, 18.2, 18.3, 18.4, 19.1, 19.2.
Affected platforms: NFX150, SRX1500, SRX4100, SRX4200, vSRX.
Problem:
An input validation vulnerability exists in Juniper Networks Junos OS, allowing
an attacker to crash the srxpfe process, causing a Denial of Service (DoS)
through the use of specific maintenance commands. The srxpfe process restarts
automatically, but continuous execution of the commands could lead to an
extended Denial of Service condition.
This issue only affects the SRX1500, SRX4100, SRX4200, NFX150, and vSRX-based
platforms. No other products or platforms are affected by this vulnerability.
This issue affects the following versions of Juniper Networks Junos OS:
o 15.1X49 versions prior to 15.1X49-D220;
o 17.4 versions prior to 17.4R3-S3;
o 18.1 versions prior to 18.1R3-S11;
o 18.2 versions prior to 18.2R3-S5;
o 18.3 versions prior to 18.3R2-S4, 18.3R3-S3;
o 18.4 versions prior to 18.4R2-S5, 18.4R3-S4;
o 19.1 versions prior to 19.1R3-S2;
o 19.2 versions prior to 19.2R1-S5, 19.2R3.
This issue does not affect Junos OS 19.3 or any subsequent version.
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was discovered during external security research.
This issue has been assigned CVE-2020-1682 .
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS 15.1X49-D220, 17.4R3-S3, 18.1R3-S11, 18.2R3-S5, 18.3R2-S4,
18.3R3-S3, 18.4R2-S5, 18.4R3-S4, 19.1R3-S2, 19.2R1-S5, and 19.2R3.
Note: This fix has also been proactively committed into other releases that
might not be vulnerable to this issue.
This issue is being tracked as 1486905 .
Workaround:
Use access lists or firewall filters to limit access to the device only from
trusted hosts.
Implementation:
Software releases or updates are available for download at https://
www.juniper.net/support/downloads/ .
Modification History:
2020-10-14: Initial Publication
CVSS Score:
5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Severity Level:
Medium
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."
Acknowledgements:
Juniper SIRT would like to acknowledge and thank The UK's National Cyber
Security Centre (NCSC) for responsibly reporting this vulnerability.
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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
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
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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