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…

high 8.7 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

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

CWE-755