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

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CVE-2021-31369

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
19/10/2021
Last modified:
26/10/2021

Description

On MX Series platforms with MS-MPC/MS-MIC, an Allocation of Resources Without Limits or Throttling vulnerability in Juniper Networks Junos OS allows an unauthenticated network attacker to cause a partial Denial of Service (DoS) with a high rate of specific traffic. If a Class of Service (CoS) rule is attached to the service-set and a high rate of specific traffic is processed by this service-set, for some of the other traffic which has services applied and is being processed by this MS-MPC/MS-MIC drops will be observed. Continued receipted of this high rate of specific traffic will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on MX Series with MS-MPC/MS-MIC: All versions prior to 17.4R3-S5; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S7, 19.3R3-S3; 19.4 versions prior to 19.4R3-S5; 20.1 versions prior to 20.1R2-S2, 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2.

Impact

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

Base Score: 5.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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): Low

Base Score 3.x
5.30
Severity 3.x
MEDIUM
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:*:*:*:*:*:*:*:* 17.4 (excluding)
cpe:2.3:o:juniper:junos:17.4:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r1-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r1-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r1-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r1-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r1-s7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r2-s10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r2-s11:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.4:r2-s12:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools