6.5

CVE-2023-36849

An Improper Check or Handling of Exceptional Conditions vulnerability in the Layer-2 control protocols daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a Denial of Service (DoS).

When a malformed LLDP packet is received, l2cpd will crash and restart. The impact of the l2cpd crash is reinitialization of STP protocols (RSTP, MSTP or VSTP), and MVRP and ERP. Also, if any services depend on LLDP state (like PoE or VoIP device recognition), then these will also be affected. Continued receipt of such packets will lead to a sustained Denial of Service.

This issue affects:
Juniper Networks Junos OS
21.4 versions prior to 21.4R3-S3;
22.1 versions prior to 22.1R3-S3;
22.2 versions prior to 22.2R2-S1, 22.2R3;
22.3 versions prior to 22.3R2.

Juniper Networks Junos OS Evolved
21.4-EVO versions prior to 21.4R3-S2-EVO;
22.1-EVO versions prior to 22.1R3-S3-EVO;
22.2-EVO versions prior to 22.2R2-S1-EVO, 22.2R3-EVO;
22.3-EVO versions prior to 22.3R2-EVO.

Data is provided by the National Vulnerability Database (NVD)
Juniper ≫ Junos Version21.4 Update-
Juniper ≫ Junos Version21.4 Updater1
Juniper ≫ Junos Version21.4 Updater1-s1
Juniper ≫ Junos Version21.4 Updater1-s2
Juniper ≫ Junos Version21.4 Updater2
Juniper ≫ Junos Version21.4 Updater2-s1
Juniper ≫ Junos Version21.4 Updater2-s2
Juniper ≫ Junos Version21.4 Updater3
Juniper ≫ Junos Version21.4 Updater3-s1
Juniper ≫ Junos Version21.4 Updater3-s2
Juniper ≫ Junos Version22.1 Updater1
Juniper ≫ Junos Version22.1 Updater1-s1
Juniper ≫ Junos Version22.1 Updater1-s2
Juniper ≫ Junos Version22.1 Updater2
Juniper ≫ Junos Version22.1 Updater2-s1
Juniper ≫ Junos Version22.1 Updater2-s2
Juniper ≫ Junos Version22.1 Updater3
Juniper ≫ Junos Version22.1 Updater3-s1
Juniper ≫ Junos Version22.1 Updater3-s2
Juniper ≫ Junos Version22.2 Updater1
Juniper ≫ Junos Version22.2 Updater1-s1
Juniper ≫ Junos Version22.2 Updater1-s2
Juniper ≫ Junos Version22.2 Updater2
Juniper ≫ Junos Version22.3 Updater1
Juniper ≫ Junos Version22.3 Updater1-s1
Juniper ≫ Junos Version22.3 Updater1-s2
Juniper ≫ Junos Os Evolved Version21.4 Update-
Juniper ≫ Junos Os Evolved Version21.4 Updater1
Juniper ≫ Junos Os Evolved Version21.4 Updater1-s1
Juniper ≫ Junos Os Evolved Version21.4 Updater1-s2
Juniper ≫ Junos Os Evolved Version21.4 Updater2
Juniper ≫ Junos Os Evolved Version21.4 Updater2-s1
Juniper ≫ Junos Os Evolved Version21.4 Updater2-s2
Juniper ≫ Junos Os Evolved Version21.4 Updater3
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s1
Juniper ≫ Junos Os Evolved Version22.1 Updater1
Juniper ≫ Junos Os Evolved Version22.1 Updater1-s1
Juniper ≫ Junos Os Evolved Version22.1 Updater1-s2
Juniper ≫ Junos Os Evolved Version22.1 Updater2
Juniper ≫ Junos Os Evolved Version22.1 Updater2-s1
Juniper ≫ Junos Os Evolved Version22.1 Updater3
Juniper ≫ Junos Os Evolved Version22.1 Updater3-s1
Juniper ≫ Junos Os Evolved Version22.1 Updater3-s2
Juniper ≫ Junos Os Evolved Version22.2 Updater1
Juniper ≫ Junos Os Evolved Version22.2 Updater1-s1
Juniper ≫ Junos Os Evolved Version22.2 Updater2
Juniper ≫ Junos Os Evolved Version22.3 Updater1
Juniper ≫ Junos Os Evolved Version22.3 Updater1-s1
Juniper ≫ Junos Os Evolved Version22.3 Updater1-s2
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.09% 0.259
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
sirt@juniper.net 6.5 2.8 3.6
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-703 Improper Check or Handling of Exceptional Conditions

The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product.

https://supportportal.juniper.net/JSA71660
Vendor Advisory
Mitigation