CVE-2021-20322
High
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.
SeverityHigh
CVSS7.4
Exploit probability—
Product
Linux Kernel
PublishedFeb 18, 2022
First seenFeb 18, 2022
Weakness typeCWE-330CWE-330
How to fix
Update
- linux linux_kernel4.19.215, 5.4.157, 5.10.62, 5.13.14 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.15 ≤ v < 4.19.215, 4.20 ≤ v < 5.4.157, 5.5 ≤ v < 5.10.62, 5.11 ≤ v < 5.13.14 | 4.19.215, 5.4.157, 5.10.62, 5.13.14 |
| fedoraproject fedora | 34 | — |
| debian debian_linux | 9.0, 10.0 | — |
| netapp active_iq_unified_manager | No range specified | — |
| netapp e-series_santricity_os_controller | 11.0 ≤ v ≤ 11.70.1 | — |
| netapp solidfire\,_enterprise_sds_\&_hci_storage_node | No range specified | — |
| netapp solidfire_\&_hci_management_node | No range specified | — |
| netapp fas_baseboard_management_controller_firmware | No range specified | — |
| netapp aff_baseboard_management_controller_firmware | No range specified | — |
| netapp aff_a700s_firmware | No range specified | — |
| netapp h700s_firmware | No range specified | — |
| netapp h700e_firmware | No range specified | — |
| netapp h500s_firmware | No range specified | — |
| netapp h410s_firmware | No range specified | — |
| netapp h500e_firmware | No range specified | — |
| netapp h300e_firmware | No range specified | — |
| netapp h300s_firmware | No range specified | — |
| netapp hci_compute_node_firmware | No range specified | — |
| oracle communications_cloud_native_core_binding_support_function | 22.1.3 | — |
| oracle communications_cloud_native_core_network_exposure_function | 22.1.1 | — |
| oracle communications_cloud_native_core_policy | 22.2.0 | — |
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