Denial of service in Juniper Junos OS pfe



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-44203
CWE-ID CWE-703
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 Juniper Junos OS
Operating systems & Components / Operating system

Vendor Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper check or handling of exceptional conditions

EUVDB-ID: #VU82111

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/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-2023-44203

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

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 check or handling of exceptional conditions error in the Packet Forwarding Engine (pfe) when a specific IGMP packet is received in an isolated VLAN. A remote non-authenticated attacker can perform a denial of service (DoS) attack.

The vulnerability affects QFX5000 series, EX2300, EX3400, EX4100, EX4400 and EX4600 platforms only.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1-S1 - 22.3R1

CPE2.3 External links

https://supportportal.juniper.net/s/article/2023-10-Security-Bulletin-Junos-OS-QFX5000-series-EX2300-EX3400-EX4100-EX4400-and-EX4600-Packet-flooding-will-occur-when-IGMP-traffic-is-sent-to-an-isolated-VLAN-CVE-2023-44203


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.



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