CVE-2022-0492
Linux Kernel contains an improper authentication vulnerability which could allow for privilege escalation via the cgroups v1 release_agent feature.
Ver en NVDAnálisis
Una vulnerabilidad en el kernel de Linux permite el escalamiento de privilegios y el escape de contenedores mediante la funcionalidad cgroups v1. Este fallo está siendo explotado activamente y compromete directamente el aislamiento de namespaces en entornos que utilizan Docker o Kubernetes.
Roles relevantes
Severidad
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCWE-287CWE-862CISA KEV
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS
Afecta
linux:linux_kerneldebian:debian_linuxredhat:codeready_linux_builderredhat:codeready_linux_builder_for_power_little_endianredhat:virtualization_hostredhat:enterprise_linuxredhat:enterprise_linux_eusredhat:enterprise_linux_for_ibm_z_systemsredhat:enterprise_linux_for_ibm_z_systems_eusredhat:enterprise_linux_for_power_little_endianredhat:enterprise_linux_for_power_little_endian_eusredhat:enterprise_linux_for_real_time_for_nfv_tusredhat:enterprise_linux_for_real_time_tusredhat:enterprise_linux_server_ausredhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutionsredhat:enterprise_linux_server_tusredhat:enterprise_linux_server_update_services_for_sap_solutionscanonical:ubuntu_linuxfedoraproject:fedoranetapp:solidfire\,_enterprise_sds_\&_hci_storage_nodenetapp:solidfire_\&_hci_management_nodenetapp:h300enetapp:h300snetapp:h410cnetapp:h410snetapp:h500enetapp:h500snetapp:h700enetapp:h700snetapp:hci_compute_nodeDescripción técnica
A vulnerability was found in the Linux kernel’s cgroup_release_agent_write in the kernel/cgroup/cgroup-v1.c function. This flaw, under certain circumstances, allows the use of the cgroups v1 release_agent feature to escalate privileges and bypass the namespace isolation unexpectedly.
Referencias
- http://packetstormsecurity.com/files/166444/Kernel-Live-Patch-Security-Notice-LSN-0085-1.html
- http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html
- http://packetstormsecurity.com/files/176099/Docker-cgroups-Container-Escape.html
- https://bugzilla.redhat.com/show_bug.cgi?id=2051505
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f6008564183aa120d07c03d9289519c2fe02af
- https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://security.netapp.com/advisory/ntap-20220419-0002/