Vulnerability identifier: #VU75095

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-28976

CWE-ID: CWE-754

Exploitation vector: Network

Exploit availability: No

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

Vendor: Juniper Networks, Inc.

Description

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

The vulnerability exists due to improper error handling in the packet forwarding engine (pfe). If specific traffic is received on MX Series and its rate exceeds the respective DDoS protection limit the ingress PFE will crash and restart.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.1 - 21.1R3-S4, 21.2R1 - 21.2R3-S3, 20.4 - 20.4R3-S5, 19.4 - 19.4R3-S10, 19.4R1 - 19.4R1-S4, 21.4R1 - 21.4R2-S2, 22.1R1 - 22.1R1-S2, 20.2 - 20.2R3-S4, 21.3R1 - 21.3R2-S2

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External links
http://supportportal.juniper.net/s/article/2023-04-Security-Bulletin-Junos-OS-MX-Series-If-a-specific-traffic-rate-goes-above-the-DDoS-threshold-it-will-lead-to-an-FPC-crash-CVE-2023-28976

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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.