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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2023-36849

Junos OS and Junos OS Evolved: The l2cpd will crash when a malformed LLDP packet is received

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Status
Published
Published
Updated
Assigning organization
juniper

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Juniper Networks Junos OS

Default version status: unaffected

  • 21.4 to < 21.4R3-S3affected
  • 22.1 to < 22.1R3-S3affected
  • 22.2 to < 22.2R2-S1, 22.2R3affected
  • 22.3 to < 22.3R2affected

Juniper Networks Junos OS Evolved

Default version status: unaffected

  • 21.4 to < 21.4R3-S2-EVOaffected
  • 22.1 to < 22.1R3-S3-EVOaffected
  • 22.2 to < 22.2R2-S1-EVO, 22.2R3-EVOaffected
  • 22.3 to < 22.3R2-EVOaffected

References