Vulnerability in Juniper Junos
CVE-2023-36840
A Reachable Assertion vulnerability in Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a locally-based, low-privileged attacker to cause a Denial of Service (DoS). On all Junos OS and Junos OS Evolved, when a specific L2VPN command is run, RPD will crash and restart. Continued execution of this specific command will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS All versions prior to 19.3R3-S10; 20.1 versions prior to 20.1R3-S4; 20.2 versions prior to 20.2R3-S6; 20.3 versions prior to 20.3R3-S6; 20.4 versions prior to 20.4R3-S5; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3-S3; 21.3 versions prior to 21.3R3-S2; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R3; 22.2 versions prior to 22.2R2; 22.3 versions prior to 22.3R2; Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S7-EVO; 21.1 versions prior to 21.1R3-S3-EVO; 21.2 versions prior to 21.2R3-S5-EVO; 21.3 versions prior to 21.3R3-S4-EVO; 21.4 versions prior to 21.4R3-EVO; 22.1 versions prior to 22.1R3-EVO; 22.2 versions prior to 22.2R2-EVO; 22.3 versions prior to 22.3R2-EVO;
EPSS: 0.002 (9.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Juniper Junos — versions 19.3, 19.4, 20.1
- Juniper Junos_os_evolved — versions 20.4, 21.1, 21.2
- Juniper Networks Junos Os — versions unspecified, 20.1, 20.2
- Juniper Networks Junos Os Evolved — versions unspecified, 21.1, 21.2
Weakness classification (CWE)
References
- sirt@juniper.net (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-36840?
- CVE-2023-36840 is a medium-severity vulnerability in Juniper Junos, classified under Reachable Assertion. CVSS score: 5.5/10. Published 2023-07-14.
- How severe is CVE-2023-36840?
- Medium severity. CVSS v3 base score is 5.5 out of 10.