Use of Incorrect Operator Vulnerability in Juniper Networks Junos OS Evolved Firewall
CVE-2025-52985

6.9MEDIUM

Key Information:

Vendor

Juniper Networks
Status
Junos Os Evolved
Vendor
CVE Published:
11 July 2025

Badges

👾 Exploit Exists

What is CVE-2025-52985?

A vulnerability exists within the Routing Engine firewall of Juniper Networks' Junos OS Evolved that can allow an unauthenticated network attacker to bypass security restrictions. Specifically, when a firewall filter applied to the lo0 or re:mgmt interface references a prefix list with 'from prefix-list', the filter fails to match if the list exceeds 10 entries. This flaw affects both IPv4 and IPv6 traffic, allowing packets to evade filtering under certain configurations, posing significant security risks.

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Affected Version(s)

Junos OS Evolved 23.2R2-S3-EVO < 23.2R2-S4-EVO

Junos OS Evolved 23.4R2-S3-EVO < 23.4R2-S5-EVO

Junos OS Evolved 24.2R2-EVO < 24.2R2-S1-EVO

References

https://supportportal.juniper.net/JSA100091
vendor-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
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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