CVE-2018-0167

There is a buffer overflow vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software which could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code.

What this means for your business

It affects Cisco IOS, XR, and XE Software. It matters if your company, or a supplier that handles your data, runs it.
Attackers are already using it. CISA added it to its list of flaws used in real attacks on 3 March 2022.
FIRST's prediction model gives it a 3% chance of attack attempts being seen in the next 30 days, ranking above 88% of all known flaws.

What to do

1Check whether your company or your suppliers run Cisco IOS, XR, and XE Software.
2If you do, follow CISA's required action below. No patch reference has been published yet.
3Treat it as urgent. US federal agencies must fix it by 17 March 2022. That deadline does not apply to private companies, but it shows how seriously CISA takes it.
4Because attackers have used it, check the affected systems for signs of a break-in, not only for the update.

Not sure if your company is exposed?

Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.

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Required action

Apply updates per vendor instructions.

CISA’s wording, unedited.

Scoring

CVSS: Not yet scored

Dates

Published: 2022-03-03
Added to KEV: 2022-03-03
Remediation due: 2022-03-17
Sources: CISA KEV