#VU49910 Memory leak in lldpd - CVE-2020-27827

Vulnerability identifier: #VU49910

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/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-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
https://github.com/lldpd/lldpd/blob/master/NEWS
https://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.