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CVE-2021-0202

CVE information

Published

1 year ago

Last Modified

1 month ago

CVSSv2.0 Severity

Medium

CVSSv3.1 Severity

High

Impact Analysis

Description

On Juniper Networks MX Series and EX9200 Series platforms with Trio-based MPC (Modular Port Concentrator) where Integrated Routing and Bridging (IRB) interface is configured and it is mapped to a VPLS instance or a Bridge-Domain, certain network events at Customer Edge (CE) device may cause memory leak in the MPC which can cause an out of memory and MPC restarts. When this issue occurs, there will be temporary traffic interruption until the MPC is restored. An administrator can use the following CLI command to monitor the status of memory usage level of the MPC: user@device> show system resource-monitor fpc FPC Resource Usage Summary Free Heap Mem Watermark : 20 % Free NH Mem Watermark : 20 % Free Filter Mem Watermark : 20 % * - Watermark reached Slot # % Heap Free RTT Average RTT 1 87 PFE # % ENCAP mem Free % NH mem Free % FW mem Free 0 NA 88 99 1 NA 89 99 When the issue is occurring, the value of “% NH mem Free” will go down until the MPC restarts. This issue affects MX Series and EX9200 Series with Trio-based PFEs (Packet Forwarding Engines). Please refer to https://kb.juniper.net/KB25385 for the list of Trio-based PFEs. This issue affects Juniper Networks Junos OS on MX Series, EX9200 Series: 17.3R3-S8; 17.4R3-S2; 18.2R3-S4, 18.2R3-S5; 18.3R3-S2, 18.3R3-S3; 18.4 versions starting from 18.4R3-S1 and later versions prior to 18.4R3-S6; 19.2 versions starting from 19.2R2 and later versions prior to 19.2R3-S1; 19.4 versions starting from 19.4R2 and later versions prior to 19.4R2-S3, 19.4R3; 20.2 versions starting from 20.2R1 and later versions prior to 20.2R1-S3, 20.2R2. This issue does not affect Juniper Networks Junos OS: 18.1, 19.1, 19.3, 20.1..

CVSSv2.0 Score

Severity
Medium
Base Score
5/10
Exploit Score
10/10
Access Vector
Network
Access Complexity
Low
Authentication Required
None
Impact Score
2.9/10
Confidentiality Impact
None
Availability Impact
Partial
Integrity Impact
None

CVSSv3.1 Score

Severity
High
Base Score
7.5/10
Exploit Score
3.9/10
Access Vector
Network
Access Complexity
Low
Privileges Required
None
Impact Score
3.6/10
Confidentiality Impact
None
Availability Impact
High
Integrity Impact
None
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:juniper:junos:18.2:r3-s4:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:18.4:r3-s2:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:18.4:r3-s1:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:17.4:r3-s2:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:18.4:r3-s3:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:18.4:r3-s4:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:17.3:r3-s8:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:18.2:r3-s5:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:18.3:r3-s2:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:18.3:r3-s3:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:18.4:r3-s5:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:19.2:r2:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:19.2:r3:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:19.4:r2-s2:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:juniper:junos:20.2:r1-s2:*:*:*:*:*:*
  Yes
-
cpe:2.3:h:juniper:mx5:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx10:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx40:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx80:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx104:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx240:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx480:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx960:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx2010:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:ex9200:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx10000:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx10003:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx150:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx2008:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx2020:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:juniper:mx204:-:*:*:*:*:*:*:*
  No
-