Vulnerability Details : CVE-2021-0209

In Juniper Networks Junos OS Evolved an attacker sending certain valid BGP update packets may cause Junos OS Evolved to access an uninitialized pointer causing RPD to core leading to a Denial of Service (DoS). Continued receipt of these types of valid BGP update packets will cause an extended Denial of Service condition. RPD will require a restart to recover. An indicator of compromise is to see if the file rpd.re exists by issuing the command: show system core-dumps This issue affects: Juniper Networks Junos OS Evolved 19.4 versions prior to 19.4R2-S2-EVO; 20.1 versions prior to 20.1R1-S2-EVO, 20.1R2-S1-EVO. This issue does not affect Junos OS.
Published 2021-01-15 18:15:15
Updated 2021-10-25 15:20:21
Source Juniper Networks, Inc.
View at NVD,   CVE.org
Vulnerability category: Denial of service

Products affected by CVE-2021-0209

Exploit prediction scoring system (EPSS) score for CVE-2021-0209

EPSS FAQ
0.06%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 23 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-0209

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
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
 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-2021-0209

References for CVE-2021-0209

  • https://kb.juniper.net/JSA11099
    2021-01 Security Bulletin: Junos OS Evolved: Receipt of certain valid BGP update packets from BGP peers may cause RPD to core when using REGEX. (CVE-2021-0209) - Juniper Networks
    Vendor Advisory
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