Remote code execution in lldpd

1) Out-of-bounds read

EUVDB-ID: #VU100252

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-41910

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a boundary condition within the cdp_decode() function in daemon/protocols/cdp.c. A remote attacker can send a specially crafted CDP PDU packet with specific CDP_TLV_ADDRESSES TLVs, trigger an out-of-bounds read and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

lldpd: 1.0.0 - 1.0.16

CPE2.3

• cpe:2.3:a:vincentbernat:lldpd:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:vincentbernat:lldpd:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:vincentbernat:lldpd:1.0.2:*:*:*:*:*:*:*

External links

https://github.com/lldpd/lldpd/commit/a9aeabdf879c25c584852a0bb5523837632f099b
https://github.com/lldpd/lldpd/releases/tag/1.0.17

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.