CVE-2025-21602
Severity CVSS v4.0:
HIGH
Type:
Unavailable / Other
Publication date:
09/01/2025
Last modified:
09/01/2025
Description
An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker sending a specific BGP update packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). <br />
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Continuous receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.<br />
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This issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability.<br />
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This issue affects Junos OS: <br />
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* from 21.4 before 21.4R3-S9, <br />
* from 22.2 before 22.2R3-S5, <br />
* from 22.3 before 22.3R3-S4,<br />
* from 22.4 before 22.4R3-S5, <br />
* from 23.2 before 23.2R2-S3, <br />
* from 23.4 before 23.4R2-S3, <br />
* from 24.2 before 24.2R1-S2, 24.2R2; <br />
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This issue does not affect versions prior to 21.1R1.<br />
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Junos OS Evolved: <br />
<br />
<br />
<br />
* from 21.4 before 21.4R3-S9-EVO, <br />
* from 22.2 before 22.2R3-S5-EVO, <br />
* from 22.3 before 22.3R3-S4-EVO,<br />
* from 22.4 before 22.4R3-S5-EVO, <br />
* from 23.2 before 23.2R2-S3-EVO, <br />
* from 23.4 before 23.4R2-S3-EVO, <br />
* from 24.2 before 24.2R1-S2-EVO, 24.2R2-EVO.<br />
<br />
<br />
This issue does not affect versions prior to 21.1R1-EVO
Impact
Base Score 4.0
7.10
Severity 4.0
HIGH
Base Score 3.x
6.50
Severity 3.x
MEDIUM