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

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CVE-2021-31383

Severity CVSS v4.0:
Pending analysis
Type:
CWE-787 Out-of-bounds Write
Publication date:
19/10/2021
Last modified:
25/10/2021

Description

In Point to MultiPoint (P2MP) scenarios within established sessions between network or adjacent neighbors the improper use of a source to destination copy write operation combined with a Stack-based Buffer Overflow on certain specific packets processed by the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved sent by a remote unauthenticated network attacker causes the RPD to crash causing a Denial of Service (DoS). Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R2-S3, 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 19.2R1. Juniper Networks Junos OS Evolved 20.1 versions prior to 20.1R3-EVO; 20.2 versions prior to 20.2R3-EVO; 20.3 versions prior to 20.3R2-EVO.

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:M/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

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

Base Score 2.0
4.30
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r1-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r1-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r1-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.2:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools