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

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CVE-2021-31353

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

Description

An Improper Handling of Exceptional Conditions vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an attacker to inject a specific BGP update, causing the routing protocol daemon (RPD) to crash and restart, leading to a Denial of Service (DoS). Continued receipt and processing of the BGP update will create a sustained Denial of Service (DoS) condition. This issue affects very specific versions of Juniper Networks Junos OS: 19.3R3-S2; 19.4R3-S3; 20.2 versions 20.2R2-S3 and later, prior to 20.2R3-S2; 20.3 versions 20.3R2 and later, prior to 20.3R3; 20.4 versions 20.4R2 and later, prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS 20.1 is not affected by this issue. This issue also affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-S3-EVO, 20.4R3-EVO; 21.1-EVO versions prior to 21.1R2-EVO; 21.2-EVO versions prior to 21.2R2-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: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:19.3:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:19.4:r3-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r2-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.2:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.3:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.3:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.1:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:* 20.3 (including)
cpe:2.3:o:juniper:junos_os_evolved:20.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.4:r1-s2:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools