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

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CVE-2021-31362

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

Description

A Protection Mechanism Failure vulnerability in RPD (routing protocol daemon) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause established IS-IS adjacencies to go down by sending a spoofed hello PDU leading to a Denial of Service (DoS) condition. Continued receipted of these spoofed PDUs will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS All versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO.

Impact

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

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Adjacent
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
6.50
Severity 3.x
MEDIUM
Vector 2.0
AV:A/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 3.30 LOW
Vector: AV:A/AC:L/Au:N/C:N/I:N/A:P

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

Base Score 2.0
3.30
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* 18.1 (including)
cpe:2.3:o:juniper:junos:18.2:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r1-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r1-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r2-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r2-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r2-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r2-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:r2-s7:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools