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CVE-2025-21598— Junos OS and Junos OS Evolved: When BGP traceoptions are configured, receipt of malformed BGP packets causes RPD to crash

Quick assessment

Affected
Juniper Networks Junos OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Juniper Networks Junos OS和Juniper Networks Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。Juniper Networks Junos OS Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS和Juniper Network

CVSS 7.5 · High EPSS 0.72% · P52
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I. Basic Information for CVE-2025-21598

Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: When BGP traceoptions are configured, receipt of malformed BGP packets causes RPD to crash
Source: CVE Program / CVE List V5
Vulnerability Description
An Out-of-bounds Read vulnerability in Juniper Networks Junos OS and Junos OS Evolved'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. This issue affects: Junos OS:  * from 21.2R3-S8 before 21.2R3-S9,  * from 21.4R3-S7 before 21.4R3-S9,  * from 22.2R3-S4 before 22.2R3-S5,  * from 22.3R3-S2 before 22.3R3-S4,  * from 22.4R3 before 22.4R3-S5,  * from 23.2R2 before 23.2R2-S2,  * from 23.4R1 before 23.4R2-S1,  * from 24.2R1 before 24.2R1-S1, 24.2R2. Junos OS Evolved: * from 21.4R3-S7-EVO before 21.4R3-S9-EVO,  * from 22.2R3-S4-EVO before 22.2R3-S5-EVO,  * from 22.3R3-S2-EVO before 22.3R3-S4-EVO,  * from 22.4R3-EVO before 22.4R3-S5-EVO,  * from 23.2R2-EVO before 23.2R2-S2-EVO,  * from 23.4R1-EVO before 23.4R2-S1-EVO,  * from 24.2R1-EVO before 24.2R1-S2-EVO, 24.2R2-EVO. This issue requires a BGP session to be established. This issue can propagate and multiply through multiple ASes until reaching vulnerable devices. This issue affects iBGP and eBGP. This issue affects IPv4 and IPv6. An indicator of compromise may be the presence of malformed update messages in a neighboring AS which is unaffected by this issue: For example, by issuing the command on the neighboring device:  show log messages Reviewing for similar messages from devices within proximity to each other may indicate this malformed packet is propagating:   rpd[<pid>]: Received malformed update from <IP address> (External AS <AS#>) and   rpd[<pid>]: Malformed Attribute
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。Juniper Networks Junos OS Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS和Juniper Network
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Juniper Networks Junos OS 21.2R3-S8 ~ 21.2R3-S9 -
Juniper Networks Junos OS Evolved 21.4R3-S7-EVO ~ 21.4R3-S9-EVO -

II. Public POCs for CVE-2025-21598

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III. Intelligence Information for CVE-2025-21598

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Vendor Advisories for CVE-2025-21598 (2)

Same Patch Batch · Juniper Networks · 2025-01-09 · 7 CVEs total

CVE-2025-21599 7.5 HIGH Junos OS Evolved: Receipt of specifically malformed IPv6 packets causes kernel memory exha
CVE-2025-21600 6.5 MEDIUM Junos OS and Junos OS Evolved: With certain BGP options enabled, receipt of specifically m
CVE-2025-21602 6.5 MEDIUM Junos OS and Junos OS Evolved: Receipt of specially crafted BGP update packet causes RPD c
CVE-2025-21593 6.5 MEDIUM Junos OS and Junos OS Evolved: On SRv6 enabled devices, an attacker sending a malformed BG
CVE-2025-21596 5.5 MEDIUM Junos OS: SRX1500,SRX4100,SRX4200: Execution of low-privileged CLI command results in chas
CVE-2025-21592 5.5 MEDIUM Junos OS: SRX Series: Low privileged user able to access highly sensitive information on f

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-125

V. Comments for CVE-2025-21598

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