Vulnerability Details : CVE-2021-0236
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.
Vulnerability category: Denial of service
Products affected by CVE-2021-0236
- cpe:2.3:o:juniper:junos:18.4:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r1-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r1-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r1-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r1-s5:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r1-s6:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r2-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r2-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r1-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r1-s5:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r1-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r1-s7:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r2-s5:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:r2-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:r2-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.1:r1-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r3-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r3-s5:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r1-s5:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r2-s6:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.3:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.3:r2-s5:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.1:r1-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:18.4:r3-s6:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r2-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r1-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:19.1:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:19.1:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:19.3:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:19.3:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-0236
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-0236
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:L/Au:S/C:N/I:N/A:C |
8.0
|
6.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
Juniper Networks, Inc. |
CWE ids for CVE-2021-0236
-
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.Assigned by:
- nvd@nist.gov (Primary)
- sirt@juniper.net (Secondary)
References for CVE-2021-0236
-
https://kb.juniper.net/JSA11131
2021-04 Security Bulletin: Junos OS: A specific BGP VPNv6 flowspec message causes routing protocol daemon (rpd) process to crash with a core. (CVE-2021-0236) - Juniper NetworksVendor Advisory
Jump to