CVE-2021-20322
7.4
HIGH
CVSS 3.1
EPSS 6.9%
Description
A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well.
How to fix CVE-2021-20322
To remediate CVE-2021-20322, upgrade the affected package to a fixed version below.
- —upgrade to 5.10.70-1 or later
Is CVE-2021-20322 being exploited?
Moderate — EPSS is 6.9%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (1)
- from 0, < 5.10.70-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |