Rapid7 Vulnerability & Exploit Database

Ubuntu: (Multiple Advisories) (CVE-2021-3493): Linux kernel (OEM) vulnerabilities

Free InsightVM Trial No Credit Card Necessary
Watch Demo See how it all works
Back to Search

Ubuntu: (Multiple Advisories) (CVE-2021-3493): Linux kernel (OEM) vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
04/15/2021
Created
04/20/2021
Added
04/16/2021
Modified
03/22/2023

Description

The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivileged overlay mounts, an attacker could use this to gain elevated privileges.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1017-dell300x
  • ubuntu-upgrade-linux-image-4-15-0-1070-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1084-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1090-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1098-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1099-aws
  • ubuntu-upgrade-linux-image-4-15-0-1101-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1113-azure
  • ubuntu-upgrade-linux-image-4-15-0-142-generic
  • ubuntu-upgrade-linux-image-4-15-0-142-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-142-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-1091-aws
  • ubuntu-upgrade-linux-image-4-4-0-1092-aws
  • ubuntu-upgrade-linux-image-4-4-0-1092-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1093-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1127-aws
  • ubuntu-upgrade-linux-image-4-4-0-1128-aws
  • ubuntu-upgrade-linux-image-4-4-0-1151-raspi2
  • ubuntu-upgrade-linux-image-4-4-0-1152-raspi2
  • ubuntu-upgrade-linux-image-4-4-0-1155-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-1156-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-209-generic
  • ubuntu-upgrade-linux-image-4-4-0-209-generic-lpae
  • ubuntu-upgrade-linux-image-4-4-0-209-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-209-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-4-0-209-powerpc-smp
  • ubuntu-upgrade-linux-image-4-4-0-209-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-4-0-209-powerpc64-smp
  • ubuntu-upgrade-linux-image-4-4-0-210-generic
  • ubuntu-upgrade-linux-image-4-4-0-210-generic-lpae
  • ubuntu-upgrade-linux-image-4-4-0-210-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-210-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-4-0-210-powerpc-smp
  • ubuntu-upgrade-linux-image-4-4-0-210-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-4-0-210-powerpc64-smp
  • ubuntu-upgrade-linux-image-5-10-0-1022-oem
  • ubuntu-upgrade-linux-image-5-3-0-1039-raspi2
  • ubuntu-upgrade-linux-image-5-3-0-1040-raspi2
  • ubuntu-upgrade-linux-image-5-3-0-1042-gke
  • ubuntu-upgrade-linux-image-5-3-0-1043-gke
  • ubuntu-upgrade-linux-image-5-3-0-73-generic
  • ubuntu-upgrade-linux-image-5-3-0-73-lowlatency
  • ubuntu-upgrade-linux-image-5-3-0-74-generic
  • ubuntu-upgrade-linux-image-5-3-0-74-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-1014-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1034-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1038-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1042-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1042-gke
  • ubuntu-upgrade-linux-image-5-4-0-1043-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1045-aws
  • ubuntu-upgrade-linux-image-5-4-0-1046-azure
  • ubuntu-upgrade-linux-image-5-4-0-72-generic
  • ubuntu-upgrade-linux-image-5-4-0-72-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-72-lowlatency
  • ubuntu-upgrade-linux-image-5-6-0-1054-oem
  • ubuntu-upgrade-linux-image-5-6-0-1055-oem
  • ubuntu-upgrade-linux-image-5-8-0-1021-raspi
  • ubuntu-upgrade-linux-image-5-8-0-1021-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-8-0-1024-kvm
  • ubuntu-upgrade-linux-image-5-8-0-1026-oracle
  • ubuntu-upgrade-linux-image-5-8-0-1028-gcp
  • ubuntu-upgrade-linux-image-5-8-0-1029-azure
  • ubuntu-upgrade-linux-image-5-8-0-1030-aws
  • ubuntu-upgrade-linux-image-5-8-0-50-generic
  • ubuntu-upgrade-linux-image-5-8-0-50-generic-64k
  • ubuntu-upgrade-linux-image-5-8-0-50-generic-lpae
  • ubuntu-upgrade-linux-image-5-8-0-50-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-aws-lts-18-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-lts-18-04
  • ubuntu-upgrade-linux-image-dell300x
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-18-04
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-64k
  • ubuntu-upgrade-linux-image-generic-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lpae-lts-xenial
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-5-3
  • ubuntu-upgrade-linux-image-gke-5-4
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-5-3
  • ubuntu-upgrade-linux-image-gkeop-5-4
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-20-04
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-20-04b
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-18-04
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-e500mc-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc-smp-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-emb-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • ubuntu-upgrade-linux-image-powerpc64-smp-lts-xenial
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-raspi-hwe-18-04
  • ubuntu-upgrade-linux-image-raspi-nolpae
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-raspi2-hwe-18-04
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-16-04
  • ubuntu-upgrade-linux-image-virtual-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual-hwe-20-04
  • ubuntu-upgrade-linux-image-virtual-lts-xenial

References

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;