Access of memory location after end of buffer in Junos OS Evolved and Juniper Junos OS

1) Access of memory location after end of buffer

EUVDB-ID: #VU88444

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-21618

CWE-ID: CWE-788 - Access of Memory Location After End of Buffer

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 access of memory location after end of buffer error in the Layer-2 Control Protocols Daemon (l2cpd). A remote non-authenticated attacker can cause Denial of Service (DoS).

On all Junos OS and Junos OS Evolved platforms, when LLDP is enabled on a specific interface, and a malformed LLDP packet is received, l2cpd crashes and restarts.

The impact of the l2cpd crash is reinitialization of STP protocols (RSTP, MSTP or VSTP), and MVRP and ERP.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 21.4R1-EVO - 23.2R1-S2-EVO

Juniper Junos OS: 21.4R1 - 23.4R1-S1

External links

http://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-When-LLDP-is-enabled-and-a-malformed-LLDP-packet-is-received-l2cpd-crashes-CVE-2024-21618

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.