Denial of Service Vulnerability in Juniper Networks Junos OS and Junos OS Evolved
CVE-2025-30646

7.1HIGH

Key Information:

Vendor

Juniper Networks
Status
Junos Os
Junos Os Evolved
Vendor
CVE Published:
9 April 2025

Badges

👾 Exploit Exists

What is CVE-2025-30646?

A Signed to Unsigned Conversion Error in the Layer 2 Control Protocol daemon (l2cpd) of Juniper Networks products permits an unauthenticated attacker to send a specially crafted LLDP TLV. When received, this malformed packet causes l2cpd to crash and restart, leading to a denial of service condition. This situation is exacerbated when an LLDP telemetry subscription is active, resulting in repeated crashes and sustained service interruptions.

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Affected Version(s)

Junos OS 0 < 21.2R3-S9

Junos OS 21.4 < 21.4R3-S10

Junos OS 22.2 < 22.2R3-S6

References

https://supportportal.juniper.net/JSA96456
vendor-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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