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CVE-2024-39555— Junos OS and Junos OS Evolved: Receipt of a specific malformed BGP update causes the session to reset

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 0.50% · P41
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I. Basic Information for CVE-2024-39555

Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: Receipt of a specific malformed BGP update causes the session to reset
Source: CVE Program / CVE List V5
Vulnerability 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 attacker sending a specific malformed BGP update message to cause the session to reset, resulting in a Denial of Service (DoS). Continued receipt and processing of these malformed BGP update messages will create a sustained Denial of Service (DoS) condition. Upon receipt of a BGP update message over an established BGP session containing a specifically malformed tunnel encapsulation attribute, when segment routing is enabled, internal processing of the malformed attributes within the update results in improper parsing of remaining attributes, leading to session reset: BGP SEND Notification code 3 (Update Message Error) subcode 1 (invalid attribute list) Only systems with segment routing enabled are vulnerable to this issue. This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations, and requires a remote attacker to have at least one established BGP session. This issue affects: Junos OS: * All versions before 21.4R3-S8, * from 22.2 before 22.2R3-S4, * from 22.3 before 22.3R3-S3, * from 22.4 before 22.4R3-S3, * from 23.2 before 23.2R2-S1, * from 23.4 before 23.4R1-S2, 23.4R2. Junos OS Evolved:  * All versions before 21.4R3-S8-EVO, * from 22.2-EVO before 22.2R3-S4-EVO, * from 22.3-EVO before 22.3R3-S3-EVO, * from 22.4-EVO before 22.4R3-S3-EVO, * from 23.2-EVO before 23.2R2-S1-EVO, * from 23.4-EVO before 23.4R1-S2-EVO, 23.4R2-EVO.
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
对异常条件的处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 安全漏洞
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 0 ~ 21.4R3-S8 -
Juniper Networks Junos OS Evolved 0 ~ 21.4R3-S8-EVO -

II. Public POCs for CVE-2024-39555

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III. Intelligence Information for CVE-2024-39555

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Other References for CVE-2024-39555 (1)

Same Patch Batch · Juniper Networks · 2024-07-10 · 15 CVEs total

CVE-2024-39518 7.5 HIGH Junos OS: MX240, MX480, MX960 platforms using MPC10E: Memory leak will be observed when su
CVE-2024-39562 7.5 HIGH Junos OS Evolved: A high rate of SSH connections causes a Denial of Service
CVE-2024-39512 6.6 MEDIUM Junos OS Evolved: User is not logged out when the console cable is disconnected
CVE-2024-39517 6.5 MEDIUM Junos OS and Junos OS Evolved: Upon processing specific L2 traffic, rpd can hang in device
CVE-2024-39514 6.5 MEDIUM Junos OS and Junos OS Evolved: Receiving specific traffic on devices with EVPN-VPWS with I
CVE-2024-39560 6.5 MEDIUM Junos OS and Junos OS Evolved: Memory leak due to RSVP neighbor persistent error leading t
CVE-2024-39558 6.5 MEDIUM Junos OS and Junos OS Evolved: Receipt of specific PIM packet causes rpd crash when PIM is
CVE-2024-39557 6.5 MEDIUM Junos OS Evolved: MAC table changes cause a memory leak
CVE-2024-39556 6.4 MEDIUM Junos OS and Junos OS Evolved: Loading a malicious certificate from the CLI may result in
CVE-2024-39559 5.9 MEDIUM Junos OS Evolved: Receipt of a specific TCP packet may result in a system crash (vmcore) o
CVE-2024-39554 5.9 MEDIUM Junos OS and Junos OS Evolved: BGP multipath incremental calculation is resulting in an rp
CVE-2024-39561 5.8 MEDIUM Junos OS: SRX4600, SRX5000 Series: TCP packets with SYN/FIN or SYN/RST are transferred aft
CVE-2024-39513 5.5 MEDIUM Junos OS Evolved: Execution of a specific CLI command will cause a crash in the AFT manage
CVE-2024-39511 5.5 MEDIUM Junos OS: The 802.1X Authentication Daemon crashes on running a specific command

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-755

V. Comments for CVE-2024-39555

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