Vulnerability Details CVE-2021-31351
An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects specific versions of Juniper Networks Junos OS on MX Series: 17.3R3-S11; 17.4R2-S13; 17.4R3 prior to 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19.4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; This issue does not affect any version of Juniper Networks Junos OS prior to 15.1X49-D240;
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 59.2%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
Products affected by CVE-2021-31351
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cpe:2.3:h:juniper:mx10000:-
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cpe:2.3:h:juniper:mx10003:-
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cpe:2.3:h:juniper:mx10008:-
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cpe:2.3:h:juniper:mx10016:-
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cpe:2.3:h:juniper:mx104:-
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cpe:2.3:h:juniper:mx150:-
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cpe:2.3:h:juniper:mx2008:-
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cpe:2.3:h:juniper:mx2010:-
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cpe:2.3:h:juniper:mx2020:-
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cpe:2.3:h:juniper:mx204:-
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cpe:2.3:h:juniper:mx240:-
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cpe:2.3:h:juniper:mx480:-
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cpe:2.3:h:juniper:mx960:-
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cpe:2.3:o:juniper:junos:17.3
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cpe:2.3:o:juniper:junos:17.4
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cpe:2.3:o:juniper:junos:18.1
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cpe:2.3:o:juniper:junos:18.2
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cpe:2.3:o:juniper:junos:18.3
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cpe:2.3:o:juniper:junos:18.4
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cpe:2.3:o:juniper:junos:19.1
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cpe:2.3:o:juniper:junos:19.2
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cpe:2.3:o:juniper:junos:19.3
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cpe:2.3:o:juniper:junos:19.4
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cpe:2.3:o:juniper:junos:20.1
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cpe:2.3:o:juniper:junos:20.2
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cpe:2.3:o:juniper:junos:20.3
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cpe:2.3:o:juniper:junos:20.4
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cpe:2.3:o:juniper:junos:21.1