CVE-2021-0236 Details

CVE-2021-0236

Published: 2021-04-22
Last Modified: 2021-04-27
CVE Author: NIST National Vulnerability Database
CVE Assigner: sirt@juniper.net
Summary

Due to an improper check for unusual or exceptional conditions in Juniper Networks Junos OS and Junos OS Evolved the Routing Protocol Daemon (RPD) service, upon receipt of a specific matching BGP packet meeting a specific term in the flowspec configuration, crashes and restarts causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects only Multiprotocol BGP (MP-BGP) VPNv6 FlowSpec deployments. This issue affects: Juniper Networks Junos OS: 18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S7; 19.1 versions prior to 19.1R2-S2, 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R2-S4, 19.4R3-S1; 20.1 versions prior to 20.1R2, 20.1R3; 20.2 versions prior to 20.2R2, 20.2R3; 20.3 versions prior to 20.3R1-S1, 20.3R2. Juniper Networks Junos OS Evolved: All versions after 18.4R1-EVO prior to 20.3R2-EVO. This issue does not affect: Juniper Networks Junos OS versions prior to 18.4R1. Juniper Networks Junos OS Evolved versions prior to 18.4R1-EVO.

Analysis
Common Vulnerability Score System v2.0
Severity Medium
Base Score 6.8/10
Exploit Score 8/10
Access Vector Network
Access Complexity Low
Authentication Single
Impact Score 6.9/10
Confidentiality Impact None
Availability Impact Complete
Integrity Impact None
Vector String AV:N/AC:L/Au:S/C:N/I:N/A:C
Common Vulnerability Score System v3.1
Severity Medium
Base Score 6.5/10
Exploit Score 2.8/10
Access Vector Network
Access Complexity Low
Privileges Required Low
Impact Score 3.6/10
Confidentiality Impact None
Availability Impact High
Integrity Impact None
Scope Unchanged
User Interaction None
Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Products Reported
CPE Vulnerable Start Excluding
cpe:2.3:o:juniper:junos:18.4:-:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r1-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r1-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r1-s3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r1-s4:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r1-s5:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r1-s6:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r1-s7:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r2-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r2-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:-:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r1-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r1-s3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r1-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r2-s3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r1-s4:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r3-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r3-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r2-s4:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r2-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r3-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r3-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r3-s3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r3-s4:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r3-s5:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r3-s3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r2-s5:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r2-s6:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.1:r1-s5:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:18.4:r3-s6:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos_os_evolved:19.3:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos_os_evolved:19.3:r2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos_os_evolved:19.1:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos_os_evolved:19.1:r2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r1-s4:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.1:r1-s3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:r2-s3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:r2-s4:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.2:r1-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.4:r2-s2:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.4:r3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:r2-s5:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.3:r3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r1-s5:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.3:r1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r2-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.1:r1-s4:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:20.2:r1-s3:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.2:r3-s1:*:*:*:*:*:* Yes - -
cpe:2.3:o:juniper:junos:19.4:r2-s3:*:*:*:*:*:* Yes - -
References

https://kb.juniper.net/JSA11131

CVE ID
CVE-2021-0236
Published
2021-04-22
Modified
2021-04-27
CVSSv2.0
Medium
CVSSv3.1
Medium
PCI Compliance
Pass
US-CERT Alert
No
CWE
CWE-754

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