Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

Go to Calendar     Go to Press Room     Go to Newsletters subscription

Search

CVE-2025-21598

Severity CVSS v4.0:
HIGH
Type:
CWE-125 Out-of-bounds Read
Publication date:
09/01/2025
Last modified:
09/01/2025

Description

An Out-of-bounds Read vulnerability in Juniper Networks Junos OS and Junos OS Evolved&amp;#39;s routing protocol daemon (rpd) allows an unauthenticated, network-based attacker to send malformed BGP packets to a device configured with packet receive trace options enabled to crash rpd.<br /> This issue affects:<br /> <br /> Junos OS: <br /> <br /> <br /> <br /> * from 21.2R3-S8 before 21.2R3-S9, <br /> * from 21.4R3-S7 before 21.4R3-S9, <br /> * from 22.2R3-S4 before 22.2R3-S5, <br /> * from 22.3R3-S2 before 22.3R3-S4, <br /> * from 22.4R3 before 22.4R3-S5, <br /> * from 23.2R2 before 23.2R2-S2, <br /> * from 23.4R1 before 23.4R2-S1, <br /> * from 24.2R1 before 24.2R1-S1, 24.2R2.<br /> <br /> <br /> Junos OS Evolved:<br /> * from 21.4R3-S7-EVO before 21.4R3-S9-EVO, <br /> * from 22.2R3-S4-EVO before 22.2R3-S5-EVO, <br /> * from 22.3R3-S2-EVO before 22.3R3-S4-EVO, <br /> * from 22.4R3-EVO before 22.4R3-S5-EVO, <br /> * from 23.2R2-EVO before 23.2R2-S2-EVO, <br /> * from 23.4R1-EVO before 23.4R2-S1-EVO, <br /> * from 24.2R1-EVO before 24.2R1-S2-EVO, 24.2R2-EVO.<br /> <br /> <br /> This issue requires a BGP session to be established.<br /> <br /> This issue can propagate and multiply through multiple ASes until reaching vulnerable devices.<br /> <br /> This issue affects iBGP and eBGP.<br /> <br /> This issue affects IPv4 and IPv6.<br /> <br /> An indicator of compromise may be the presence of malformed update messages in a neighboring AS which is unaffected by this issue:<br /> <br /> For example, by issuing the command on the neighboring device:<br />  show log messages<br /> <br /> Reviewing for similar messages from devices within proximity to each other may indicate this malformed packet is propagating:<br />   rpd[]: Received malformed update from (External AS )<br /> and<br />   rpd[]: Malformed Attribute

Impact

Vector 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Amber CVSS v4.0 Severity and Metrics:

Base Score: 8.20 HIGH
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Amber

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): Present
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): None
Integrity (VI): None
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): Low
Automatable (AU): Yes
Recovery (R): Automatic
Value Density (V): Concentrated
Vulnerability Response Effort (RE): Moderate
Provider Urgency (U): Amber

Base Score 4.0
8.20
Severity 4.0
HIGH
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools