ID

VAR-202105-1475

CVE

CVE-2020-26147

TITLE

Linux Kernel  Vulnerability in

DESCRIPTION

An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. This update provides the corresponding updates for the Linux KVM kernel for Ubuntu 21.04. ========================================================================== Ubuntu Security Notice USN-5343-1 March 22, 2022 linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM Summary: Several security issues were fixed in the Linux kernel. A local attacker could use this to gain administrative privileges. (CVE-2022-0492) It was discovered that the aufs file system in the Linux kernel did not properly restrict mount namespaces, when mounted with the non-default allow_userns option set. A local attacker could use this to gain administrative privileges. (CVE-2016-2853) It was discovered that the aufs file system in the Linux kernel did not properly maintain POSIX ACL xattr data, when mounted with the non-default allow_userns option. A local attacker could possibly use this to gain elevated privileges. An attacker could use this to construct a malicious f2fs image that, when mounted and operated on, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-19449) It was discovered that the XFS file system implementation in the Linux kernel did not properly validate meta data in some circumstances. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service. (CVE-2020-12655) 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) Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly handle error conditions in some situations, leading to an infinite loop. A local attacker could use this to cause a denial of service. (CVE-2020-25673) Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation incorrectly handled EAPOL frames from unauthenticated senders. A physically proximate attacker could inject malicious packets to cause a denial of service (system crash). A physically proximate attacker could possibly use this to pair to a device without knowledge of the pin-code. An authenticated attacker could possibly use this to expose sensitive information. (CVE-2020-26558, CVE-2021-0129) It was discovered that the FUSE user space file system implementation in the Linux kernel did not properly handle bad inodes in some situations. A local attacker could possibly use this to cause a denial of service. (CVE-2020-36322) It was discovered that the Infiniband RDMA userspace connection manager implementation in the Linux kernel contained a race condition leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possible execute arbitrary code. A privileged attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. A privileged attacker could use this to cause a denial of service. (CVE-2021-20317) Or Cohen and Nadav Markus discovered a use-after-free vulnerability in the nfc implementation in the Linux kernel. A privileged local attacker could use this issue to cause a denial of service (system crash) or possibly execute arbitrary code. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-28688) 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. A local attacker could use this to cause a denial of service (system crash). (CVE-2021-29650) It was discovered that a race condition in the kernel Bluetooth subsystem could lead to use-after-free of slab objects. An attacker could use this issue to possibly execute arbitrary code. (CVE-2021-32399) It was discovered that the CIPSO implementation in the Linux kernel did not properly perform reference counting in some situations, leading to use- after-free vulnerabilities. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33034) Asaf Modelevsky discovered that the Intel(R) Ethernet ixgbe driver for the Linux kernel did not properly validate large MTU requests from Virtual Function (VF) devices. A local attacker could possibly use this to cause a denial of service. (CVE-2021-33098) Norbert Slusarek discovered that the CAN broadcast manger (bcm) protocol implementation in the Linux kernel did not properly initialize memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2021-34693) 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. A local attacker could use this issue to cause a denial of service (system crash). (CVE-2021-3506) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device initialization failure, leading to a double-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3564) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device detach events, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3573) Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612) It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679) It was discovered that the Virtio console implementation in the Linux kernel did not properly validate input lengths in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-38160) It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly compute the access permissions for shadow pages in some situations. A local attacker could use this to cause a denial of service. (CVE-2021-38198) It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2021-38204) It was discovered that the NFC implementation in the Linux kernel did not properly handle failed connect events leading to a NULL pointer dereference. A local attacker could use this to cause a denial of service. A local attacker could possibly use this to expose sensitive information (kernel memory). A local attacker could use this to cause a denial of service or possibly gain administrative privileges. (CVE-2021-40490) It was discovered that the 6pack network protocol driver in the Linux kernel did not properly perform validation checks. A privileged attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-42008) It was discovered that the ISDN CAPI implementation in the Linux kernel contained a race condition in certain situations that could trigger an array out-of-bounds bug. A privileged local attacker could possibly use this to cause a denial of service or execute arbitrary code. (CVE-2021-43389) It was discovered that the Phone Network protocol (PhoNet) implementation in the Linux kernel did not properly perform reference counting in some error conditions. A local attacker could possibly use this to cause a denial of service (memory exhaustion). An attacker could use this to construct a malicious f2fs image that, when mounted and operated on, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-45469) Amit Klein discovered that the IPv6 implementation in the Linux kernel could disclose internal state in some situations. An attacker could possibly use this to expose sensitive information. An attacker could use this to expose sensitive information or in conjunction with another kernel vulnerability. (CVE-2018-5995) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: linux-image-4.4.0-1103-kvm 4.4.0-1103.112 linux-image-4.4.0-1138-aws 4.4.0-1138.152 linux-image-4.4.0-222-generic 4.4.0-222.255 linux-image-4.4.0-222-lowlatency 4.4.0-222.255 linux-image-aws 4.4.0.1138.143 linux-image-generic 4.4.0.222.229 linux-image-kvm 4.4.0.1103.101 linux-image-lowlatency 4.4.0.222.229 linux-image-virtual 4.4.0.222.229 Ubuntu 14.04 ESM: linux-image-4.4.0-1102-aws 4.4.0-1102.107 linux-image-4.4.0-222-generic 4.4.0-222.255~14.04.1 linux-image-4.4.0-222-lowlatency 4.4.0-222.255~14.04.1 linux-image-aws 4.4.0.1102.100 linux-image-generic-lts-xenial 4.4.0.222.193 linux-image-lowlatency-lts-xenial 4.4.0.222.193 linux-image-virtual-lts-xenial 4.4.0.222.193 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-5343-1 CVE-2016-2853, CVE-2016-2854, CVE-2018-5995, CVE-2019-19449, CVE-2020-12655, CVE-2020-25670, CVE-2020-25671, CVE-2020-25672, CVE-2020-25673, CVE-2020-26139, CVE-2020-26147, CVE-2020-26555, CVE-2020-26558, CVE-2020-36322, CVE-2020-36385, CVE-2021-0129, CVE-2021-20292, CVE-2021-20317, CVE-2021-23134, CVE-2021-28688, CVE-2021-28972, CVE-2021-29650, CVE-2021-32399, CVE-2021-33033, CVE-2021-33034, CVE-2021-33098, CVE-2021-34693, CVE-2021-3483, CVE-2021-3506, CVE-2021-3564, CVE-2021-3573, CVE-2021-3612, CVE-2021-3679, CVE-2021-38160, CVE-2021-38198, CVE-2021-38204, CVE-2021-38208, CVE-2021-39648, CVE-2021-40490, CVE-2021-42008, CVE-2021-43389, CVE-2021-45095, CVE-2021-45469, CVE-2021-45485, CVE-2022-0492

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

arbitrary

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Ubuntu

SOURCES

LAST UPDATE DATE

2024-11-20T21:54:30.604000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE