Vulnerability Details : CVE-2021-0287
In a Segment Routing ISIS (SR-ISIS)/MPLS environment, on Juniper Networks Junos OS and Junos OS Evolved devices, configured with ISIS Flexible Algorithm for Segment Routing and sensor-based statistics, a flap of a ISIS link in the network, can lead to a routing process daemon (RPD) crash and restart, causing a Denial of Service (DoS). Continued link flaps will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 19.4 versions prior to 19.4R1-S4, 19.4R3-S2; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R2-S2, 20.2R3; 20.3 versions prior to 20.3R2; Juniper Networks Junos OS Evolved: 20.3-EVO versions prior to 20.3R2-EVO; 20.4-EVO versions prior to 20.4R2-EVO. This issue does not affect: Juniper Networks Junos OS releases prior to 19.4R1. Juniper Networks Junos OS Evolved releases prior to 19.4R1-EVO.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2021-0287
Probability of exploitation activity in the next 30 days: 0.06%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 23 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-0287
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.7
|
MEDIUM | AV:A/AC:M/Au:N/C:N/I:N/A:C |
5.5
|
6.9
|
NIST |
|
6.5
|
MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
Juniper Networks, Inc. |
CWE ids for CVE-2021-0287
-
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-2021-0287
-
https://kb.juniper.net/JSA11189
2021-07 Security Bulletin: Junos OS and Junos OS Evolved: RPD could crash in SR-ISIS/MPLS environment due to a flap of a ISIS link in the network (CVE-2021-0287) - Juniper NetworksVendor Advisory
Products affected by CVE-2021-0287
- 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: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:20.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:*
- 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:20.1:r1-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r2-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r1-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.1:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.3:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.4:r1-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:20.3:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:20.4:r1-s1:*:*:*:*:*:*