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

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CVE-2020-1679

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
16/10/2020
Last modified:
05/08/2022

Description

On Juniper Networks PTX and QFX Series devices with packet sampling configured using tunnel-observation mpls-over-udp, sampling of a malformed packet can cause the Kernel Routing Table (KRT) queue to become stuck. KRT is the module within the Routing Process Daemon (RPD) that synchronized the routing tables with the forwarding tables in the kernel. This table is then synchronized to the Packet Forwarding Engine (PFE) via the KRT queue. Thus, when KRT queue become stuck, it can lead to unexpected packet forwarding issues. An administrator can monitor the following command to check if there is the KRT queue is stuck: user@device > show krt state ... Number of async queue entries: 65007

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:17.2x75:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.2x75:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.2x75:d102:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.2x75:d50:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.2x75:d70:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.2x75:d92:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r2-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r3-s10:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools