Vulnerability in Juniper Junos
CVE-2023-36842
An Improper Check for Unusual or Exceptional Conditions vulnerability in Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause the jdhcpd to consume all the CPU cycles resulting in a Denial of Service (DoS). On Junos OS devices with forward-snooped-client configured, if an attacker sends a specific DHCP packet to a non-configured interface, this will cause an infinite loop. The DHCP process will have to be restarted to recover the service. This issue affects: Juniper Networks Junos OS * All versions earlier than 20.4R3-S9; * 21.2 versions earlier than 21.2R3-S7; * 21.3 versions earlier than 21.3R3-S5; * 21.4 versions earlier than 21.4R3-S5; * 22.1 versions earlier than 22.1R3-S4; * 22.2 versions earlier than 22.2R3-S3; * 22.3 versions earlier than 22.3R3-S2; * 22.4 versions earlier than 22.4R2-S2, 22.4R3; * 23.2 versions earlier than 23.2R2.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (19.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
- Juniper Junos — versions 20.4, 21.2, 21.3
- Juniper Networks Junos OS — versions 0, 21.2, 21.3
Weakness classification (CWE)
References
- supportportal.juniper.net/JSA75730 (vendor-advisory, Vendor Advisory)
- www.first.org/cvss/calculator/4.0 (technical-description, Not Applicable)
Frequently asked questions
- What is CVE-2023-36842?
- CVE-2023-36842 is a medium-severity vulnerability in Juniper Junos, classified under CWE-703. CVSS score: 6.5/10. Published 2024-01-12.
- How severe is CVE-2023-36842?
- Medium severity. CVSS v3 base score is 6.5 out of 10.