What is CVE-2021-0209?

CVE-2021-0209 is a medium-severity vulnerability in Juniper Junos Os Evolved, classified under Access of Uninitialized Pointer. CVSS score: 6.5/10. Published 2021-01-15.

How severe is CVE-2021-0209?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Juniper Junos Os Evolved

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.

EPSS: 0.004 (36.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Juniper Junos_os_evolved — versions 19.4, 20.1
Juniper Networks Junos Os Evolved — versions 19.4, 20.1

Weakness classification (CWE)

CWE-824 — Access of Uninitialized Pointer

References

sirt@juniper.net (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-0209?: CVE-2021-0209 is a medium-severity vulnerability in Juniper Junos Os Evolved, classified under Access of Uninitialized Pointer. CVSS score: 6.5/10. Published 2021-01-15.
How severe is CVE-2021-0209?: Medium severity. CVSS v3 base score is 6.5 out of 10.