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             AUSCERT External Security Bulletin Redistribution

 JSA11105 - 2021-01 Security Bulletin: Junos OS: EX Series, QFX Series, MX
 Series, SRX Branch Series: Memory leak in packet forwarding engine due to
         802.1X authenticator port interface flaps (CVE-2021-0215)
                               4 March 2021


        AusCERT Security Bulletin Summary

Product:           Junos OS
Publisher:         Juniper Networks
Operating System:  Juniper
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        None
CVE Names:         CVE-2021-0215  

Original Bulletin: 

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2021-01 Security Bulletin: Junos OS: EX Series, QFX Series, MX Series, SRX 
Branch Series: Memory leak in packet forwarding engine due to 802.1X 
authenticator port interface flaps (CVE-2021-0215)

Article ID : JSA11105 Last Updated: 02 Mar 2021 Version : 2.0

Product Affected: This issue affects Junos OS 14.1X53, 15.1X49, 15.1X53, 16.1,
17.2, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4, 19.1, 19.2, 19.3, 19.4. Affected 
platforms: EX Series, QFX Series, MX Series, SRX Branch Series. Problem:

On Juniper Networks Junos EX series, QFX Series, MX Series, and SRX branch 
series devices, a memory leak occurs every time the 802.1X authenticator port
interface flaps which can lead to other processes, such as the pfex process, 
responsible for packet forwarding, to crash and restart.

An administrator can use the following CLI command to monitor the status of 
memory consumption:

user@device> show task memory detail

Please refer to https://kb.juniper.net/KB31522 for details.

This issue affects Juniper Networks Junos OS:

14.1X53 versions prior to 14.1X53-D54;

15.1X49 versions prior to 15.1X49-D240 ;

15.1X53 versions prior to 15.1X53-D593;

16.1 versions prior to 16.1R7-S8;

17.2 versions prior to 17.2R3-S4;

17.3 versions prior to 17.3R3-S8;

17.4 versions prior to 17.4R2-S11, 17.4R3-S2;

18.1 versions prior to 18.1R3-S10 ;

18.2 versions prior to 18.2R2-S7, 18.2R3-S3;

18.3 versions prior to 18.3R2-S4, 18.3R3-S2;

18.4 versions prior to 18.4R1-S7, 18.4R2-S4, 18.4R3-S2;

19.1 versions prior to 19.1R1-S5, 19.1R2-S2, 19.1R3;

19.2 versions prior to 19.2R1-S5, 19.2R2;

19.3 versions prior to 19.3R2-S3, 19.3R3;

19.4 versions prior to 19.4R1-S2, 19.4R2.

This issue does not affect Juniper Networks Junos OS 12.3, 15.1.

This issue may occur when the device is configured as 802.1X authenticator 
port and the interface flaps.

Minimum configuration stanza required related to this issue is the following:


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-2021-0215 .


The following software releases have been updated to resolve this specific 
issue: 14.1X53-D54, 15.1X49-D240, 15.1X53-D593, 16.1R7-S8, 17.2R3-S4, 
17.3R3-S8, 17.4R2-S11, 17.4R3-S2, 18.1R3-S10, 18.2R2-S7, 18.2R3-S3, 18.3R2-S4,
18.3R3-S2, 18.4R1-S7, 18.4R2-S4, 18.4R3-S2, 19.1R1-S5, 19.1R2-S2, 19.1R3, 
19.2R1-S5, 19.2R2, 19.3R2-S3, 19.3R3, 19.4R1-S2, 19.4R2, 20.1R1, and all 
subsequent releases.

This issue is being tracked as 1480706 .


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: 2021-01-13: Initial Publication. CVSS Score: 6.5 
(CVSS:3.1/AV:A/AC:L/PR:N/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 

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