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AUSCERT External Security Bulletin Redistribution
ESB-2020.3737
JSA11081 - 2020-10 Security Bulletin: Junos OS: SRX Series: High CPU load
due to processing for HTTP traffic when Application
Identification is enabled. (CVE-2020-1684)
29 October 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Junos OS
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-1684
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11081
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2020-10 Security Bulletin: Junos OS: SRX Series: High CPU load due to processing for HTTP traffic when Application Identification is enabled. (CVE-2020-1684)
Article ID : JSA11081
Last Updated: 28 Oct 2020
Version : 2.0
Product Affected:
This issue affects Junos OS 12.3X48, 15.1X49, 17.4, 18.1, 18.2, 18.3, 18.4,
19.1, 19.2, 19.3, 19.4. Affected platforms: SRX Series.
Problem:
On Juniper Networks SRX Series configured with application identification
inspection enabled, receipt of specific HTTP traffic can cause high CPU load
utilization, which could lead to traffic interruption.
Application identification is enabled by default and is automatically turned on
when Intrusion Detection and Prevention (IDP), AppFW, AppQoS, or AppTrack is
configured. Thus, this issue might occur when IDP, AppFW, AppQoS, or AppTrack
is configured.
This issue affects Juniper Networks Junos OS on SRX Series:
o 12.3X48 versions prior to 12.3X48-D105;
o 15.1X49 versions prior to 15.1X49-D221, 15.1X49-D230;
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-S3;
o 18.3 versions prior to 18.3R2-S4, 18.3R3-S2;
o 18.4 versions prior to 18.4R2-S5, 18.4R3-S1;
o 19.1 versions prior to 19.1R2-S2, 19.1R3;
o 19.2 versions prior to 19.2R1-S5, 19.2R2;
o 19.3 versions prior to 19.3R3;
o 19.4 versions prior to 19.4R2.
Application identification is enabled by default. Administrator can disable
application identification with the CLI.
To disable application identification:
user@host# set services application-identification
no-application-identification
user@host# commit
Or (depending on the version)
user@host# set system processes application-identification disable
user@host# commit
To check whether is enabled, administrator can use the following command:
user@host> show services application-identification application summary
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-2020-1684 .
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS 12.3X48-D105, 15.1X49-D221, 15.1X49-D230, 17.4R3-S3,
18.1R3-S11, 18.2R3-S3, 18.3R2-S4, 18.3R3-S2, 18.4R2-S5, 18.4R3-S1, 19.1R2-S2,
19.1R3, 19.2R1-S5, 19.2R2, 19.3R3, 19.4R2, 20.1R1,and all subsequent releases.
This issue is being tracked as 1473151 .
Workaround:
There are no viable workarounds for this issue.
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:
7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
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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This security bulletin is provided as a service to AusCERT's members. As
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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
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On call after hours for member emergencies only.
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