var-202103-1240
Vulnerability from variot

A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer before a cloning operation, aka CID-dbcc7d57bffc. Vendor exploits this vulnerability CID-dbcc7d57bffc Is published as.Denial of service (DoS) It may be put into a state. A physically proximate attacker could use this issue to inject packets. ========================================================================== Ubuntu Security Notice USN-4948-1 May 11, 2021

linux-oem-5.10 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description: - 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. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-3491)

Kiyin (尹亮) 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 (尹亮) 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). 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. 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). 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). 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)

马哲宇 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 LTS: linux-image-5.10.0-1026-oem 5.10.0-1026.27 linux-image-oem-20.04b 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: https://ubuntu.com/security/notices/USN-4948-1 CVE-2020-25670, CVE-2020-25671, CVE-2020-25672, CVE-2021-28688, CVE-2021-28951, CVE-2021-28952, CVE-2021-28964, CVE-2021-28971, CVE-2021-28972, CVE-2021-29264, CVE-2021-29266, CVE-2021-29646, CVE-2021-29647, CVE-2021-29649, CVE-2021-29650, CVE-2021-29657, CVE-2021-31916, CVE-2021-3483, CVE-2021-3489, CVE-2021-3490, CVE-2021-3491

Package Information: https://launchpad.net/ubuntu/+source/linux-oem-5.10/5.10.0-1026.27

Show details on source website


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A physically proximate\nattacker could use this issue to inject packets. ==========================================================================\nUbuntu Security Notice USN-4948-1\nMay 11, 2021\n\nlinux-oem-5.10 vulnerabilities\n==========================================================================\n\nA security issue affects these releases of Ubuntu and its derivatives:\n\n- Ubuntu 20.04 LTS\n\nSummary:\n\nSeveral security issues were fixed in the Linux kernel. \n\nSoftware Description:\n- linux-oem-5.10: Linux kernel for OEM systems\n\nDetails:\n\nRyota Shiga discovered that the eBPF implementation in the Linux kernel did\nnot properly verify that a BPF program only reserved as much memory for a\nring buffer as was allocated. A local attacker could use this to cause a\ndenial of service (system crash) or execute arbitrary code. (CVE-2021-3489)\n\nManfred Paul discovered that the eBPF implementation in the Linux kernel\ndid not properly track bounds on bitwise operations. A local attacker could\nuse this to cause a denial of service (system crash) or execute arbitrary\ncode. A local attacker could use this to cause a denial of service\n(system crash) or execute arbitrary code. (CVE-2021-3491)\n\nKiyin (\u5c39\u4eae) discovered that the NFC LLCP protocol implementation in the\nLinux kernel contained a reference counting error. A local attacker could\nuse this to cause a denial of service (system crash). (CVE-2020-25670)\n\nKiyin (\u5c39\u4eae) discovered that the NFC LLCP protocol implementation in the\nLinux kernel did not properly deallocate memory in certain error\nsituations. A local attacker could use this to cause a denial of service\n(memory exhaustion). (CVE-2020-25671, CVE-2020-25672)\n\nIt was discovered that the Xen paravirtualization backend in the Linux\nkernel did not properly deallocate memory in some situations. A local\nattacker could use this to cause a denial of service (memory exhaustion). A local attacker could\nuse this to cause a denial of service. (CVE-2021-28951)\n\nJohn Stultz discovered that the audio driver for Qualcomm SDM845 systems in\nthe Linux kernel did not properly validate port ID numbers. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. \nA local attacker could possibly use this to cause a denial of service\n(system crash). (CVE-2021-28964)\n\nVince Weaver discovered that the perf subsystem in the Linux kernel did\nnot properly handle certain PEBS records properly for some Intel Haswell\nprocessors. A local attacker could use this cause a denial of service\n(system crash). (CVE-2021-28971)\n\nIt was discovered that the RPA PCI Hotplug driver implementation in the\nLinux kernel did not properly handle device name writes via sysfs, leading\nto a buffer overflow. A privileged attacker could use this to cause a\ndenial of service (system crash) or possibly execute arbitrary code. \n(CVE-2021-28972)\n\nIt was discovered that the Freescale Gianfar Ethernet driver for the Linux\nkernel did not properly handle receive queue overrun when jumbo frames were\nenabled in some situations. An attacker could use this to cause a denial of\nservice (system crash). An attacker could use this to\ncause a denial of service (system crash) or possibly execute arbitrary\ncode. (CVE-2021-29266)\n\nIt was discovered that the TIPC protocol implementation in the Linux kernel\ndid not properly validate passed encryption key sizes. A local attacker\ncould use this to cause a denial of service (system crash). \n(CVE-2021-29646)\n\nIt was discovered that the Qualcomm IPC router implementation in the Linux\nkernel did not properly initialize memory passed to user space. A local\nattacker could use this to expose sensitive information (kernel memory). \n(CVE-2021-29647)\n\nIt was discovered that the BPF user mode driver implementation in the Linux\nkernel did not properly deallocate memory in some situations. A local\nattacker could use this to cause a denial of service (memory exhaustion). A local attacker could use this\nto cause a denial of service (system crash). (CVE-2021-29650)\n\nFelix Wilhelm discovered that the KVM implementation in the Linux kernel\nfor AMD processors contained race conditions on nested VMCB controls. A\nlocal attacker in a guest vm could possibly use this to gain elevated\nprivileges. (CVE-2021-29657)\n\nDan Carpenter discovered that the block device manager (dm) implementation\nin the Linux kernel contained a buffer overflow in the ioctl for listing\ndevices. A privileged local attacker could use this to cause a denial of\nservice (system crash). (CVE-2021-31916)\n\n\u9a6c\u54f2\u5b87 discovered that the IEEE 1394 (Firewire) nosy packet sniffer\ndriver in the Linux kernel did not properly perform reference counting in\nsome situations, leading to a use-after-free vulnerability. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-3483)\n\nUpdate instructions:\n\nThe problem can be corrected by updating your system to the following\npackage versions:\n\nUbuntu 20.04 LTS:\n  linux-image-5.10.0-1026-oem     5.10.0-1026.27\n  linux-image-oem-20.04b          5.10.0.1026.27\n\nAfter a standard system update you need to reboot your computer to make\nall the necessary changes. \n\nATTENTION: Due to an unavoidable ABI change the kernel updates have\nbeen given a new version number, which requires you to recompile and\nreinstall all third party kernel modules you might have installed. \nUnless you manually uninstalled the standard kernel metapackages\n(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,\nlinux-powerpc), a standard system upgrade will automatically perform\nthis as well. \n\nReferences:\n  https://ubuntu.com/security/notices/USN-4948-1\n  CVE-2020-25670, CVE-2020-25671, CVE-2020-25672, CVE-2021-28688,\n  CVE-2021-28951, CVE-2021-28952, CVE-2021-28964, CVE-2021-28971,\n  CVE-2021-28972, CVE-2021-29264, CVE-2021-29266, CVE-2021-29646,\n  CVE-2021-29647, CVE-2021-29649, CVE-2021-29650, CVE-2021-29657,\n  CVE-2021-31916, CVE-2021-3483, CVE-2021-3489, CVE-2021-3490,\n  CVE-2021-3491\n\nPackage Information:\n  https://launchpad.net/ubuntu/+source/linux-oem-5.10/5.10.0-1026.27\n",
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