Used in attacks· fix by 2022-06-13Not scored yet
Cisco IOS XR
CVE-2022-20821
Cisco IOS XR software health check opens TCP port 6379 by default on activation. An attacker can connect to the Redis instance on the open port and allow access to the Redis instance that is running within the NOSi container.
What this means for your business
- It affects Cisco IOS XR. 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 23 May 2022.
- FIRST's prediction model gives it a 12% chance of attack attempts being seen in the next 30 days, ranking above 95% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Cisco IOS XR.
- 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 13 June 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?
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Required action
Apply updates per vendor instructions.
CISA’s wording, unedited.
Scoring
- CVSS
- Not yet scored
Dates
- Published
- 2022-05-23
- Added to KEV
- 2022-05-23
- Remediation due
- 2022-06-13
- Sources
- CISA KEV