Vulnerability identifier: #VU85274

Vulnerability risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-21585

CWE-ID: CWE-755

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Junos OS Evolved
Operating systems & Components / Operating system
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of exceptional conditions error in BGP session processing. A remote non-authenticated attacker can flap BGP sessions and cause the routing protocol daemon (rpd) process to crash and restart, leading to a Denial of Service (DoS) condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 21.3-EVO - 21.3R3-S4-EVO, 21.4R1-EVO - 21.4R3-S4-EVO, 22.1-EVO - 22.1R3-S3-EVO, 22.2-EVO - 22.2R3-S2-EVO, 22.3R1-EVO - 22.3R3-EVO, 22.4R1-EVO - 22.4R2-S1-EVO, 23.1R1-EVO - 23.1R1-S1-EVO, 23.2R1-EVO

Juniper Junos OS: 20.4R1 - 20.4R3-S8, 21.2R1 - 21.2R3-S6, 21.3R1 - 21.3R3-S4, 21.4R1 - 21.4R3-S4, 22.1R1 - 22.1R3-S3, 22.2R1 - 22.2R3-S2, 22.3R1 - 22.3R2-S2, 22.4R1 - 22.4R2-S1, 23.1R1 - 23.1R1-S1

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External links
http://supportportal.juniper.net/s/article/2024-01-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-rpd-process-crash-due-to-BGP-flap-on-NSR-enabled-devices-CVE-2024-21585

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.