CVE-2024-39555

published 2024-07-10

CVE-2024-39555: An Improper Handling of Exceptional Conditions vulnerability in the Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an…

Priority P3 42 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C N I N A H

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.

Affected

27 ranges · showing 25

Vendor	Product	Version range	Fixed in
juniper	junos	< 21.4	21.4
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos_os	—	—
juniper	junos_os_evolved	< 21.4	21.4
juniper	junos_os_evolved	—	—
juniper	junos_os_evolved	—	—
juniper	junos_os_evolved	—	—
juniper	junos_os_evolved	—	—
juniper	junos_os_evolved	—	—
juniper	junos_os_evolved	—	—
juniper_networks	junos_os	< 21.4R3-S8	21.4R3-S8
juniper_networks	junos_os	>= 22.2 < 22.2R3-S4	22.2R3-S4
juniper_networks	junos_os	>= 22.3 < 22.3R3-S3	22.3R3-S3
juniper_networks	junos_os	>= 22.4 < 22.4R3-S3	22.4R3-S3
juniper_networks	junos_os	>= 23.2 < 23.2R2-S1	23.2R2-S1
juniper_networks	junos_os	>= 23.4 < 23.4R1-S2, 23.4R2	23.4R1-S2, 23.4R2
juniper_networks	junos_os_evolved	< 21.4R3-S8-EVO	21.4R3-S8-EVO
juniper_networks	junos_os_evolved	>= 22.2-EVO < 22.2R3-S4-EVO	22.2R3-S4-EVO
juniper_networks	junos_os_evolved	>= 22.3-EVO < 22.3R3-S3-EVO	22.3R3-S3-EVO
juniper_networks	junos_os_evolved	>= 22.4-EVO < 22.4R3-S3-EVO	22.4R3-S3-EVO

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd v4.0 8.7 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:A/V:X/RE:X/U:X

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