Denial of service in Junos OS and Junos OS Evolved rpd

Published: 2023-10-17

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2023-44204
CWE-ID	CWE-1286
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	Junos OS Evolved Operating systems & Components / Operating system Juniper Junos OS Operating systems & Components / Operating system
Vendor	Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper validation of syntactic correctness of input

EUVDB-ID: #VU82105

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-44204

CWE-ID: CWE-1286 - Improper Validation of Syntactic Correctness of Input

Exploit availability: No

Description

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

The vulnerability exists due to improper validation of syntactic correctness of input in routing protocol daemon (rpd) when a malformed BGP UPDATE packet is received over an established BGP session. A remote non-authenticated attacker can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 22.1-EVO - 23.2R1-S1-EVO

Juniper Junos OS: 21.4R1 - 23.2R1-S1

External links

http://supportportal.juniper.net/s/article/2023-10-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-The-rpd-will-crash-upon-receiving-a-malformed-BGP-UPDATE-message-CVE-2023-44204

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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