Unknown
CVE-2023-36839
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Unknown
(0 users assessed)
Unknown
(0 users assessed)CVE-2023-36839
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
An Improper Validation of Specified Quantity in Input vulnerability in the Layer-2 control protocols daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker who sends specific LLDP packets to cause a Denial of Service(DoS).
This issue occurs when specific LLDP packets are received and telemetry polling is being done on the device. 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.
This issue affects:
Juniper Networks Junos OS
- All versions prior to 20.4R3-S8;
- 21.1 version 21.1R1 and later versions;
- 21.2 versions prior to 21.2R3-S5;
- 21.3 versions prior to 21.3R3-S4;
- 21.4 versions prior to 21.4R3-S3;
- 22.1 versions prior to 22.1R3-S2;
- 22.2 versions prior to 22.2R3;
- 22.3 versions prior to 22.3R2-S2;
- 22.4 versions prior to 22.4R2;
Juniper Networks Junos OS Evolved
- All versions prior to 20.4R3-S8-EVO;
- 21.1 version 21.1R1-EVO and later versions;
- 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-S3-EVO;
- 22.1 versions prior to 22.1R3-S2-EVO;
- 22.2 versions prior to 22.2R3-EVO;
- 22.3 versions prior to 22.3R2-S2-EVO;
- 22.4 versions prior to 22.4R1-S1-EVO;
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CVSS V3 Severity and Metrics
General Information
Vendors
- juniper
Products
- junos,
- junos 20.4,
- junos 21.1,
- junos 21.2,
- junos 21.3,
- junos 21.4,
- junos 22.1,
- junos 22.2,
- junos 22.3,
- junos 22.4,
- junos os evolved,
- junos os evolved 20.4,
- junos os evolved 21.1,
- junos os evolved 21.2,
- junos os evolved 21.3,
- junos os evolved 21.4,
- junos os evolved 22.1,
- junos os evolved 22.2,
- junos os evolved 22.3,
- junos os evolved 22.4
References
Miscellaneous
Additional Info
Technical Analysis
Report as Exploited in the Wild
CVE ID
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