Denial of service in Junos OS and Junos OS Evolved l2cpd



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-36839
CWE-ID N/A
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 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 specified quantity in input

EUVDB-ID: #VU82091

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-2023-36839

CWE-ID: N/A

Exploit availability: No

Description

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

The vulnerability exists due to improper validation of specified quantity in input in the layer-2 control protocols daemon (l2cpd). A remote attacker on the local network can send specially crafted LLDP packet to the affected device to perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 20.4R1-EVO - 23.1R1-S1-EVO

Juniper Junos OS: 20.4R1-S1 - 22.4R1

CPE2.3 External links

https://supportportal.juniper.net/s/article/2023-10-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-An-l2cpd-crash-will-occur-when-specific-LLDP-packets-are-received-CVE-2023-36839


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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