vulnerability

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

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Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
Apr 15, 2021
Added
Apr 16, 2021
Modified
Jan 23, 2025

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-dell300xubuntu-upgrade-linux-image-4-15-0-1070-oracleubuntu-upgrade-linux-image-4-15-0-1084-raspi2ubuntu-upgrade-linux-image-4-15-0-1090-kvmubuntu-upgrade-linux-image-4-15-0-1098-gcpubuntu-upgrade-linux-image-4-15-0-1099-awsubuntu-upgrade-linux-image-4-15-0-1101-snapdragonubuntu-upgrade-linux-image-4-15-0-1113-azureubuntu-upgrade-linux-image-4-15-0-142-genericubuntu-upgrade-linux-image-4-15-0-142-generic-lpaeubuntu-upgrade-linux-image-4-15-0-142-lowlatencyubuntu-upgrade-linux-image-4-4-0-1091-awsubuntu-upgrade-linux-image-4-4-0-1092-kvmubuntu-upgrade-linux-image-4-4-0-1127-awsubuntu-upgrade-linux-image-4-4-0-1151-raspi2ubuntu-upgrade-linux-image-4-4-0-1155-snapdragonubuntu-upgrade-linux-image-4-4-0-209-genericubuntu-upgrade-linux-image-4-4-0-209-generic-lpaeubuntu-upgrade-linux-image-4-4-0-209-lowlatencyubuntu-upgrade-linux-image-4-4-0-209-powerpc-e500mcubuntu-upgrade-linux-image-4-4-0-209-powerpc-smpubuntu-upgrade-linux-image-4-4-0-209-powerpc64-embubuntu-upgrade-linux-image-4-4-0-209-powerpc64-smpubuntu-upgrade-linux-image-5-10-0-1022-oemubuntu-upgrade-linux-image-5-3-0-1039-raspi2ubuntu-upgrade-linux-image-5-3-0-1042-gkeubuntu-upgrade-linux-image-5-3-0-73-genericubuntu-upgrade-linux-image-5-3-0-73-lowlatencyubuntu-upgrade-linux-image-5-4-0-1014-gkeopubuntu-upgrade-linux-image-5-4-0-1034-raspiubuntu-upgrade-linux-image-5-4-0-1038-kvmubuntu-upgrade-linux-image-5-4-0-1042-gcpubuntu-upgrade-linux-image-5-4-0-1042-gkeubuntu-upgrade-linux-image-5-4-0-1043-oracleubuntu-upgrade-linux-image-5-4-0-1045-awsubuntu-upgrade-linux-image-5-4-0-1046-azureubuntu-upgrade-linux-image-5-4-0-72-genericubuntu-upgrade-linux-image-5-4-0-72-generic-lpaeubuntu-upgrade-linux-image-5-4-0-72-lowlatencyubuntu-upgrade-linux-image-5-6-0-1054-oemubuntu-upgrade-linux-image-5-8-0-1021-raspiubuntu-upgrade-linux-image-5-8-0-1021-raspi-nolpaeubuntu-upgrade-linux-image-5-8-0-1024-kvmubuntu-upgrade-linux-image-5-8-0-1026-oracleubuntu-upgrade-linux-image-5-8-0-1028-gcpubuntu-upgrade-linux-image-5-8-0-1029-azureubuntu-upgrade-linux-image-5-8-0-1030-awsubuntu-upgrade-linux-image-5-8-0-50-genericubuntu-upgrade-linux-image-5-8-0-50-generic-64kubuntu-upgrade-linux-image-5-8-0-50-generic-lpaeubuntu-upgrade-linux-image-5-8-0-50-lowlatencyubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-hweubuntu-upgrade-linux-image-aws-lts-18-04ubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-lts-18-04ubuntu-upgrade-linux-image-dell300xubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-gcp-lts-18-04ubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-hwe-20-04ubuntu-upgrade-linux-image-generic-hwe-16-04ubuntu-upgrade-linux-image-generic-hwe-18-04ubuntu-upgrade-linux-image-generic-hwe-20-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-generic-lpae-hwe-16-04ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04ubuntu-upgrade-linux-image-generic-lpae-lts-xenialubuntu-upgrade-linux-image-generic-lts-xenialubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-gke-5-3ubuntu-upgrade-linux-image-gke-5-4ubuntu-upgrade-linux-image-gkeopubuntu-upgrade-linux-image-gkeop-5-3ubuntu-upgrade-linux-image-gkeop-5-4ubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-hwe-16-04ubuntu-upgrade-linux-image-lowlatency-hwe-18-04ubuntu-upgrade-linux-image-lowlatency-hwe-20-04ubuntu-upgrade-linux-image-lowlatency-lts-xenialubuntu-upgrade-linux-image-oemubuntu-upgrade-linux-image-oem-20-04ubuntu-upgrade-linux-image-oem-20-04bubuntu-upgrade-linux-image-oem-osp1ubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-lts-18-04ubuntu-upgrade-linux-image-powerpc-e500mcubuntu-upgrade-linux-image-powerpc-e500mc-lts-xenialubuntu-upgrade-linux-image-powerpc-smpubuntu-upgrade-linux-image-powerpc-smp-lts-xenialubuntu-upgrade-linux-image-powerpc64-embubuntu-upgrade-linux-image-powerpc64-emb-lts-xenialubuntu-upgrade-linux-image-powerpc64-smpubuntu-upgrade-linux-image-powerpc64-smp-lts-xenialubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-raspi-hwe-18-04ubuntu-upgrade-linux-image-raspi-nolpaeubuntu-upgrade-linux-image-raspi2ubuntu-upgrade-linux-image-raspi2-hwe-18-04ubuntu-upgrade-linux-image-snapdragonubuntu-upgrade-linux-image-snapdragon-hwe-18-04ubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-16-04ubuntu-upgrade-linux-image-virtual-hwe-18-04ubuntu-upgrade-linux-image-virtual-hwe-20-04ubuntu-upgrade-linux-image-virtual-lts-xenial

References

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