Memory Management Flaw in Juniper Networks Junos OS Evolved IPv6 Configuration
CVE-2025-21599

7.5HIGH

Key Information:

Vendor

Juniper Networks
Vendor
CVE Published:
9 January 2025

What is CVE-2025-21599?

A vulnerability in the Juniper Tunnel Driver (jtd) of Junos OS Evolved allows unauthenticated network-based attackers to exploit a memory management flaw when processing specifically malformed IPv6 packets. This leads to an inability to free kernel memory, resulting in memory exhaustion and potentially causing system crashes, thereby creating a Denial of Service (DoS) condition. Systems configured with IPv6 are particularly susceptible, as continuous receipt of these packets can sustain a DoS impact. Affected versions are those from 22.4-EVO onwards, specifically before minor revisions indicated, while versions prior to 22.4R1-EVO remain unaffected.

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References

https://supportportal.juniper.net/JSA92869

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

JSON
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