#VU78273 Improper Check for Unusual or Exceptional Conditions in Juniper Junos OS - CVE-2023-36835

Vulnerability identifier: #VU78273

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-2023-36835

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) of Juniper Networks Junos OS on QFX10000 Series. A remote attacker can send specially traffic to the system and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1-S1, 20.4R2-S1, 20.4R2-S2, 20.4R3-S1, 20.4R3-S2, 20.4R3-S3, 20.4R3-S4, 20.4, 20.4R1, 20.4R2, 20.4R3, 21.1R1-S1, 21.1R2-S1, 21.1R2-S2, 21.1R3-S1, 21.1R3-S2, 21.1R3-S3, 21.1R3-S4, 21.1, 21.1R1, 21.1R2, 21.1R3, 21.2R1-S1, 21.2R1-S2, 21.2R2-S1, 21.2R2-S2, 21.2R3-S1, 21.2R3-S2, 21.2R3-S3, 21.2R3-S4, 21.2R1, 21.2R2, 21.2R3, 21.3R1-S1, 21.3R1-S2, 21.3R2-S1, 21.3R2-S2, 21.3R3-S1, 21.3R3-S2, 21.3R3-S3, 21.3R1, 21.3R2, 21.3R3, 21.4R1-S1, 21.4R1-S2, 21.4R2-S1, 21.4R2-S2, 21.4R1, 21.4R2, 21.4R3, 22.1R1-S1, 22.1R1-S2, 22.1R2-S1, 22.1R2-S2, 22.1R1, 22.1R2, 22.2R1-S1, 22.2R1-S2, 22.2R1, 22.3R1-S1, 22.3R1

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External links
https://supportportal.juniper.net/JSA71642

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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.