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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1625 USN-4948-1: Linux kernel (OEM) vulnerabilities 12 May 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Linux Kernel (OEM) Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Existing Account Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-31916 CVE-2021-30002 CVE-2021-29657 CVE-2021-29650 CVE-2021-29649 CVE-2021-29647 CVE-2021-29646 CVE-2021-29266 CVE-2021-29264 CVE-2021-28972 CVE-2021-28971 CVE-2021-28964 CVE-2021-28952 CVE-2021-28951 CVE-2021-28688 CVE-2021-28375 CVE-2021-3491 CVE-2021-3490 CVE-2021-3489 CVE-2021-3483 CVE-2020-35519 CVE-2020-25672 CVE-2020-25671 CVE-2020-25670 Reference: ESB-2021.1622 ESB-2021.1376 ESB-2021.1307 Original Bulletin: https://ubuntu.com/security/notices/USN-4948-1 https://ubuntu.com/security/notices/USN-4947-1 Comment: This bulletin contains two (2) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4948-1: Linux kernel (OEM) vulnerabilities 11 May 2021 Several security issues were fixed in the Linux kernel. Releases o Ubuntu 20.04 LTS Packages o linux-oem-5.10 - Linux kernel for OEM systems Details Ryota Shiga discovered that the eBPF implementation in the Linux kernel did not properly verify that a BPF program only reserved as much memory for a ring buffer as was allocated. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. ( CVE-2021-3489 ) Manfred Paul discovered that the eBPF implementation in the Linux kernel did not properly track bounds on bitwise operations. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. ( CVE-2021-3490 ) Billy Jheng Bing-Jhong discovered that the io_uring implementation of the Linux kernel did not properly enforce the MAX_RW_COUNT limit in some situations. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. ( CVE-2021-3491 ) Kiyin () discovered that the NFC LLCP protocol implementation in the Linux kernel contained a reference counting error. A local attacker could use this to cause a denial of service (system crash). ( CVE-2020-25670 ) Kiyin () discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly deallocate memory in certain error situations. A local attacker could use this to cause a denial of service (memory exhaustion). ( CVE-2020-25671 , CVE-2020-25672 ) It was discovered that the Xen paravirtualization backend in the Linux kernel did not properly deallocate memory in some situations. A local attacker could use this to cause a denial of service (memory exhaustion). ( CVE-2021-28688 ) It was discovered that the io_uring subsystem in the Linux kernel contained a race condition leading to a deadlock condition. A local attacker could use this to cause a denial of service. ( CVE-2021-28951 ) John Stultz discovered that the audio driver for Qualcomm SDM845 systems in the Linux kernel did not properly validate port ID numbers. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ( CVE-2021-28952 ) Zygo Blaxell discovered that the btrfs file system implementation in the Linux kernel contained a race condition during certain cloning operations. A local attacker could possibly use this to cause a denial of service (system crash). ( CVE-2021-28964 ) Vince Weaver discovered that the perf subsystem in the Linux kernel did not properly handle certain PEBS records properly for some Intel Haswell processors. A local attacker could use this cause a denial of service (system crash). ( CVE-2021-28971 ) It was discovered that the RPA PCI Hotplug driver implementation in the Linux kernel did not properly handle device name writes via sysfs, leading to a buffer overflow. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ( CVE-2021-28972 ) It was discovered that the Freescale Gianfar Ethernet driver for the Linux kernel did not properly handle receive queue overrun when jumbo frames were enabled in some situations. An attacker could use this to cause a denial of service (system crash). ( CVE-2021-29264 ) It was discovered that the vDPA backend virtio driver in the Linux kernel contained a use-after-free vulnerability. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ( CVE-2021-29266 ) It was discovered that the TIPC protocol implementation in the Linux kernel did not properly validate passed encryption key sizes. A local attacker could use this to cause a denial of service (system crash). ( CVE-2021-29646 ) It was discovered that the Qualcomm IPC router implementation in the Linux kernel did not properly initialize memory passed to user space. A local attacker could use this to expose sensitive information (kernel memory). ( CVE-2021-29647 ) It was discovered that the BPF user mode driver implementation in the Linux kernel did not properly deallocate memory in some situations. A local attacker could use this to cause a denial of service (memory exhaustion). ( CVE-2021-29649 ) It was discovered that a race condition existed in the netfilter subsystem of the Linux kernel when replacing tables. A local attacker could use this to cause a denial of service (system crash). ( CVE-2021-29650 ) Felix Wilhelm discovered that the KVM implementation in the Linux kernel for AMD processors contained race conditions on nested VMCB controls. A local attacker in a guest vm could possibly use this to gain elevated privileges. ( CVE-2021-29657 ) Dan Carpenter discovered that the block device manager (dm) implementation in the Linux kernel contained a buffer overflow in the ioctl for listing devices. A privileged local attacker could use this to cause a denial of service (system crash). ( CVE-2021-31916 ) discovered that the IEEE 1394 (Firewire) nosy packet sniffer driver in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ( CVE-2021-3483 ) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 o linux-image-oem-20.04b - 5.10.0.1026.27 o linux-image-5.10.0-1026-oem - 5.10.0-1026.27 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References o CVE-2021-3489 o CVE-2021-29649 o CVE-2021-28951 o CVE-2021-28952 o CVE-2021-29264 o CVE-2021-29650 o CVE-2021-3491 o CVE-2021-28964 o CVE-2020-25672 o CVE-2021-28972 o CVE-2021-29647 o CVE-2021-3483 o CVE-2021-28971 o CVE-2020-25670 o CVE-2021-28688 o CVE-2021-29646 o CVE-2021-3490 o CVE-2021-29657 o CVE-2021-31916 o CVE-2020-25671 o CVE-2021-29266 Related notices o USN-4947-1 : linux-image-5.6.0-1056-oem, linux-oem-5.6, linux-image-oem-20.04 o USN-4950-1 : linux-image-5.11.0-1005-azure, linux-image-aws, linux-image-generic-lpae, linux-image-5.11.0-17-lowlatency, linux-image-generic, linux-image-gke, linux-gcp, linux-azure, linux, linux-image-5.11.0-1008-raspi, linux-image-generic-64k, linux-image-5.11.0-17-generic, linux-oracle, linux-image-lowlatency, linux-raspi, linux-image-oracle, linux-image-raspi, linux-image-gcp, linux-image-azure, linux-image-5.11.0-1006-oracle, linux-image-5.11.0-17-generic-lpae, linux-image-virtual, linux-image-5.11.0-1007-kvm, linux-kvm, linux-image-5.11.0-1007-aws, linux-image-5.11.0-1007-gcp, linux-aws, linux-image-5.11.0-17-generic-64k, linux-image-5.11.0-1008-raspi-nolpae, linux-image-raspi-nolpae, linux-image-kvm o USN-4945-1 : linux-image-5.4.0-1043-gke, linux-image-5.4.0-73-lowlatency, linux-image-aws, linux-oracle-5.4, linux-image-generic-lpae, linux-image-snapdragon-hwe-18.04, linux-azure-5.4, linux-image-5.4.0-1047-azure, linux-image-generic, linux-image-5.4.0-1039-kvm, linux-image-virtual-hwe-18.04, linux-image-oem, linux-gke-5.4, linux-image-5.4.0-73-generic-lpae, linux-image-gke, linux-image-gkeop-5.4, linux-gcp, linux-azure, linux, linux-image-5.4.0-1044-oracle, linux-image-5.4.0-1045-oracle, linux-image-5.4.0-1048-aws, linux-image-5.4.0-1043-gcp, linux-gcp-5.4, linux-image-oem-osp1, linux-oracle, linux-image-lowlatency, linux-hwe-5.4, linux-image-oracle, linux-image-generic-lpae-hwe-18.04, linux-image-gcp, linux-image-lowlatency-hwe-18.04, linux-image-gke-5.4, linux-image-azure, linux-gkeop-5.4, linux-image-generic-hwe-18.04, linux-image-virtual, linux-kvm, linux-image-5.4.0-1015-gkeop, linux-gkeop, linux-aws, linux-aws-5.4, linux-image-gkeop, linux-image-5.4.0-73-generic, linux-image-kvm, linux-gke o USN-4949-1 : linux-image-generic-64k-hwe-20.04, linux-image-aws, linux-image-generic-lpae, linux-image-5.8.0-1031-gcp, linux-hwe-5.8, linux-image-5.8.0-1024-raspi, linux-image-generic, linux-image-generic-lpae-hwe-20.04, linux-image-5.8.0-1032-azure, linux-image-gke, linux-gcp, linux-azure, linux, linux-image-generic-64k, linux-image-generic-hwe-20.04, linux-image-5.8.0-53-generic-64k, linux-image-lowlatency, linux-oracle, linux-raspi, linux-image-oracle, linux-image-raspi, linux-image-gcp, linux-image-azure, linux-image-virtual, linux-kvm, linux-image-virtual-hwe-20.04, linux-image-lowlatency-hwe-20.04, linux-image-oem-20.04, linux-image-5.8.0-1033-aws, linux-aws, linux-image-5.8.0-1024-raspi-nolpae, linux-image-5.8.0-53-generic-lpae, linux-image-5.8.0-53-lowlatency, linux-image-5.8.0-1027-kvm, linux-image-raspi-nolpae, linux-image-kvm, linux-image-5.8.0-1029-oracle, linux-image-5.8.0-53-generic o USN-4946-1 : linux-image-4.15.0-1018-dell300x, linux-image-generic-lpae, linux-image-4.15.0-143-generic, linux-image-generic, linux-image-4.15.0-1085-raspi2, linux-gcp-4.15, linux-aws-hwe, linux-image-lowlatency-hwe-16.04, linux-image-oem, linux-hwe, linux-image-dell300x, linux-gcp, linux-image-gke, linux-azure, linux, linux-image-oracle-lts-18.04, linux-image-virtual-hwe-16.04, linux-image-4.15.0-1102-aws, linux-image-raspi2, linux-image-generic-hwe-16.04, linux-oracle, linux-image-lowlatency, linux-image-oracle, linux-snapdragon, linux-image-4.15.0-1071-oracle, linux-image-4.15.0-143-lowlatency, linux-image-azure-lts-18.04, linux-image-gcp, linux-azure-4.15, linux-image-4.15.0-1102-snapdragon, linux-image-azure, linux-image-4.15.0-1114-azure, linux-image-4.15.0-143-generic-lpae, linux-image-aws-lts-18.04, linux-image-snapdragon, linux-image-4.15.0-1099-gcp, linux-image-virtual, linux-kvm, linux-aws, linux-image-gcp-lts-18.04, linux-image-aws-hwe, linux-image-4.15.0-1091-kvm, linux-dell300x, linux-raspi2, linux-image-kvm - -------------------------------------------------------------------------------- USN-4947-1: Linux kernel (OEM) vulnerabilities 11 May 2021 Several security issues were fixed in the Linux kernel. Releases o Ubuntu 20.04 LTS Packages o linux-oem-5.6 - Linux kernel for OEM systems Details Kiyin () discovered that the x25 implementation in the Linux kernel contained overflows when handling addresses from user space. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ( CVE-2020-35519 ) It was discovered that the fastrpc driver in the Linux kernel did not prevent user space applications from sending kernel RPC messages. A local attacker could possibly use this to gain elevated privileges. ( CVE-2021-28375 ) It was discovered that the TIPC protocol implementation in the Linux kernel did not properly validate passed encryption key sizes. A local attacker could use this to cause a denial of service (system crash). ( CVE-2021-29646 ) It was discovered that a race condition existed in the netfilter subsystem of the Linux kernel when replacing tables. A local attacker could use this to cause a denial of service (system crash). ( CVE-2021-29650 ) Arnd Bergmann discovered that the video4linux subsystem in the Linux kernel did not properly deallocate memory in some situations. A local attacker could use this to cause a denial of service (memory exhaustion). ( CVE-2021-30002 ) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 o linux-image-5.6.0-1056-oem - 5.6.0-1056.60 o linux-image-oem-20.04 - 5.6.0.1056.52 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References o CVE-2020-35519 o CVE-2021-29650 o CVE-2021-29646 o CVE-2021-28375 o CVE-2021-30002 Related notices o USN-4948-1 : linux-image-oem-20.04b, linux-oem-5.10, linux-image-5.10.0-1026-oem o USN-4945-1 : linux-gkeop-5.4, linux-image-generic, linux-image-generic-lpae, linux-image-generic-lpae-hwe-18.04, linux-image-oem-osp1, linux-image-oem, linux, linux-kvm, linux-image-5.4.0-1039-kvm, linux-azure-5.4, linux-image-virtual, linux-image-5.4.0-1047-azure, linux-image-5.4.0-1043-gcp, linux-image-5.4.0-1015-gkeop, linux-gke-5.4, linux-oracle-5.4, linux-gkeop, linux-image-azure, linux-aws, linux-image-lowlatency, linux-image-oracle, linux-image-gcp, linux-gcp, linux-gcp-5.4, linux-image-gke-5.4, linux-image-gkeop-5.4, linux-image-5.4.0-73-generic, linux-image-5.4.0-73-generic-lpae, linux-image-gke, linux-image-snapdragon-hwe-18.04, linux-image-generic-hwe-18.04, linux-image-kvm, linux-azure, linux-image-virtual-hwe-18.04, linux-oracle, linux-gke, linux-image-5.4.0-1043-gke, linux-image-5.4.0-1048-aws, linux-image-5.4.0-1044-oracle, linux-image-aws, linux-hwe-5.4, linux-image-5.4.0-1045-oracle, linux-image-5.4.0-73-lowlatency, linux-image-gkeop, linux-image-lowlatency-hwe-18.04, linux-aws-5.4 o USN-4911-1 : linux-image-5.10.0-1021-oem, linux-oem-5.10, linux-image-oem-20.04b o USN-4949-1 : linux-image-generic, linux-image-generic-lpae, linux-image-raspi-nolpae, linux, linux-kvm, linux-image-virtual, linux-image-raspi, linux-image-generic-lpae-hwe-20.04, linux-image-5.8.0-1032-azure, linux-image-azure, linux-raspi, linux-aws, linux-image-lowlatency, linux-image-oracle, linux-image-gcp, linux-image-5.8.0-1024-raspi-nolpae, linux-image-5.8.0-1029-oracle, linux-image-5.8.0-1031-gcp, linux-image-5.8.0-53-generic, linux-gcp, linux-image-generic-64k-hwe-20.04, linux-image-oem-20.04, linux-image-gke, linux-image-virtual-hwe-20.04, linux-image-lowlatency-hwe-20.04, linux-image-5.8.0-1027-kvm, linux-image-kvm, linux-azure, linux-image-5.8.0-53-generic-lpae, linux-image-5.8.0-1024-raspi, linux-hwe-5.8, linux-oracle, linux-image-5.8.0-53-lowlatency, linux-image-generic-hwe-20.04, linux-image-aws, linux-image-generic-64k, linux-image-5.8.0-53-generic-64k, linux-image-5.8.0-1033-aws o USN-4946-1 : linux-image-aws-hwe, linux-image-generic, linux-image-generic-lpae, linux-image-oem, linux-image-4.15.0-1114-azure, linux, linux-image-4.15.0-1102-snapdragon, linux-image-4.15.0-143-lowlatency, linux-kvm, linux-hwe, linux-image-dell300x, linux-image-virtual, linux-raspi2, linux-image-4.15.0-143-generic-lpae, linux-image-4.15.0-1102-aws, linux-dell300x, linux-gcp-4.15, linux-image-oracle-lts-18.04, linux-image-4.15.0-1071-oracle, linux-image-azure, linux-aws, linux-image-aws-lts-18.04, linux-image-lowlatency, linux-image-gcp, linux-image-4.15.0-1099-gcp, linux-image-oracle, linux-image-virtual-hwe-16.04, linux-gcp, linux-image-snapdragon, linux-image-4.15.0-1085-raspi2, linux-aws-hwe, linux-image-gke, linux-image-gcp-lts-18.04, linux-image-raspi2, linux-image-lowlatency-hwe-16.04, linux-image-kvm, linux-azure, linux-oracle, linux-image-4.15.0-1018-dell300x, linux-image-azure-lts-18.04, linux-image-generic-hwe-16.04, linux-image-4.15.0-143-generic, linux-image-4.15.0-1091-kvm, linux-snapdragon, linux-azure-4.15 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYJt2WeNLKJtyKPYoAQiRihAAht15K4jPZOhA2tXIZ4vkr3fyWnyLLEi2 PDeGQZu17W7C+gcC+sFT/o7v5Gl20CpM4LmZrUGxo4c7R9/l+B0ZNKwjlIp27+ZD IeE2fIAD3vSDkwNLbt1QqFDeoPlIijCZeq1HYrK3A+H6axM+kP4d5D3PlBnPEDSU Mxz2h3GkgHHVxqZKzmDa+CffG4mbfVdU/UQnBYgIakqxpHezOXFcJaeZiQQuxxVx jEmumZJ+C2akHrGSsLMk5USAjXzYtcu8KQMj1pb/88WeK83p9g2JDp/U5XVYXlzO tYX+7h64r+vwPrP/b6zop1QE0BQLgjG//qJM+Q/n6O/12un6RqzSAJcoLWywxGtw 4ktjQ4jYhNZV1KZFXgUV49ccozHSQimjSTQKo+yslHla6d6O8DKrExhhXLkIG1CB zGy1bx1/OXNZgpFWCnloLaHQzx1ZmcbokyuFvmOWB9t0GMLVOK196PPmh34793zG hMQaf9h6oUbWrdNUX3krZ8cy+mQqbj8oz5k91oImExBCMQuAaZG90M1jplRqMXvp 6N3jGoFb3KvDfS9PrAZZKWy7/bVeY7CNFwpMr2TR/1YcgGlCSljsxN3lv7YsTBTC jpNgKlH5dsIqSG0klVuHeNu0Fb2+E5i8cv6MCNVD3/Z5qznFA6JHrJ3JWKRiq5ht CgMJkiEemR0= =FsKU -----END PGP SIGNATURE-----