Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-31351

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
19/10/2021
Last modified:
25/10/2021

Description

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;

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:juniper:junos:17.3:r3-s11:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r2-s13:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r3-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r3-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r3-s12:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r2-s8:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r3-s7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r3-s8:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.3:r3-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.4:r3-s7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.1:r3-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.1:r3-s5:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools