CVE-2023-36839
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2023
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Junos OS and Junos OS Evolved: An l2cpd crash will occur when specific LLDP packets are received
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;
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Junos OS
- Vendor
- Juniper Networks
- Product
- Junos OS
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 20.4R3-S8 | Unavailable | None listed |
| 21.1R1 | affected | semver | 21.1* | Unavailable | None listed |
| 21.2 | affected | semver | 21.2R3-S5 | Unavailable | None listed |
| 21.3 | affected | semver | 21.3R3-S4 | Unavailable | None listed |
| 21.4 | affected | semver | 21.4R3-S3 | Unavailable | None listed |
| 22.1 | affected | semver | 22.1R3-S2 | Unavailable | None listed |
| 22.2 | affected | semver | 22.2R3 | Unavailable | None listed |
| 22.3 | affected | semver | 22.3R2-S2, 22.3R3 | Unavailable | None listed |
| 22.4 | affected | semver | 22.4R2 | Unavailable | None listed |
Junos OS Evolved
- Vendor
- Juniper Networks
- Product
- Junos OS Evolved
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 20.4R3-S8-EVO | Unavailable | None listed |
| 21.1R1-EVO | affected | semver | 21.1*-EVO | Unavailable | None listed |
| 21.2-EVO | affected | semver | 21.2R3-S5-EVO | Unavailable | None listed |
| 21.3-EVO | affected | semver | 21.3R3-S4-EVO | Unavailable | None listed |
| 21.4-EVO | affected | semver | 21.4R3-S3-EVO | Unavailable | None listed |
| 22.1-EVO | affected | semver | 22.1R3-S2-EVO | Unavailable | None listed |
| 22.2-EVO | affected | semver | 22.2R3-EVO | Unavailable | None listed |
| 22.3-EVO | affected | semver | 22.3R2-S2-EVO, 22.3R3-EVO | Unavailable | None listed |
| 22.4-EVO | affected | semver | 22.4R1-S1-EVO, 22.4R2-EVO | Unavailable | None listed |