#VU94347 Improper handling of values in Junos OS Evolved - CVE-2024-39531

Vulnerability identifier: #VU94347

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-39531

CWE-ID: CWE-229

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Junos OS Evolved
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 values error in the Packet Forwarding Engine (PFE). A remote non-authenticated attacker can cause a Denial-of-Service (DoS).

 If a value is configured for DDoS bandwidth or burst parameters for any protocol in a queue, all protocols which share the same queue will have their bandwidth or burst value changed to the new value.

If, for example, OSPF was configured with a certain bandwidth value, ISIS would also be limited to this value.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 21.4R1-EVO - 21.4R3-S6-EVO, 22.1-EVO - 22.1R3-S5-EVO, 22.2-EVO - 22.2R3-S2-EVO, 22.3R1-EVO - 22.3R3-S2-EVO, 22.4R1-EVO - 22.4R3-S1-EVO, 23.2R1-EVO - 23.2R1-S2-EVO

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External links
https://supportportal.juniper.net/s/article/2024-07-Security-Bulletin-Junos-OS-Evolved-ACX7000-Series-Protocol-specific-DDoS-configuration-affects-other-protocols-CVE-2024-39531

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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.