Vulnerability CVE-2021-31383 - CERT Civis.Net

Vulnerability Name:

CVE-2021-31383 (CCN-211311)

Assigned:

2021-10-13

Published:

2021-10-13

Updated:

2021-10-25

Summary:

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.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

Vulnerability Type:

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2021-31383

Source: XF
Type: UNKNOWN
juniper-cve202131383-dos(211311)

Source: CCN
Type: Juniper Networks Security Bulletin JSA11251
Junos OS and Junos OS Evolved: In Point to MultiPoint (P2MP) scenarios receipt of various crafted packets causes RPD to core. (CVE-2021-31383)

Source: CONFIRM
Type: Vendor Advisory
https://kb.juniper.net/JSA11251

Vulnerable Configuration:

Configuration 1:

cpe:/o:juniper:junos:19.2:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s5:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r1-s6:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.2:r3-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r2-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r2-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r2-s5:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:r3-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r1-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r2-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r3-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r3-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.1:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.1:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.1:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.1:r1-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.1:r1-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.1:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.1:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.2:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.2:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.2:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.2:r1-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.2:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.2:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.2:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.3:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.3:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.1:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.1:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.1:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.1:r2-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.1:r2-s3:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.1:r2-s4:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.1:r2-s5:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.2:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.2:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.2:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.2:r2:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.2:r2-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.3:r1-s1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.3:r1-s2:*:*:*:*:*:*

OR cpe:/o:juniper:junos_os_evolved:20.3:r1-s3:*:*:*:*:*:*

Configuration CCN 1:

cpe:/o:juniper:junos:19.2:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:19.4:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.1:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.2:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_evolved:20.1:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos:20.3:r1:*:*:*:*:*:*

OR cpe:/o:juniper:junos_evolved:20.3:-:*:*:*:*:*:*

OR cpe:/o:juniper:junos_evolved:20.2:-:*:*:*:*:*:*

Denotes that component is vulnerable