Vulnerability identifier: #VU49910

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27827

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
lldpd
Other software / Other software solutions

Vendor: vincentbernat (Vincent Bernat)

Description
The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in lldpd when processing packets with multiple instances of certain TLVs. A remote attacker can send specially crafted traffic to the system and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

lldpd: 0.2 - 1.0.7

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External links
http://github.com/lldpd/lldpd/blob/master/NEWS
http://github.com/lldpd/lldpd/commit/a8d3c90feca548fc0656d95b5d278713db86ff61

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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.