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Ubuntu Security Notice USN-6604-2

Ubuntu Security Notice 6604-2 - It was discovered that the ASUS HID driver in the Linux kernel did not properly handle device removal, leading to a use-after-free vulnerability. A local attacker with physical access could plug in a specially crafted USB device to cause a denial of service. Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information.

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==========================================================================Ubuntu Security Notice USN-6604-2January 29, 2024linux-azure, linux-azure-4.15 vulnerabilities==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 18.04 LTS (Available with Ubuntu Pro)- Ubuntu 16.04 LTS (Available with Ubuntu Pro)- Ubuntu 14.04 LTS (Available with Ubuntu Pro)Summary:Several security issues were fixed in the Linux kernel.Software Description:- linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems- linux-azure: Linux kernel for Microsoft Azure Cloud systemsDetails:It was discovered that the ASUS HID driver in the Linux kernel did notproperly handle device removal, leading to a use-after-free vulnerability.A local attacker with physical access could plug in a specially crafted USBdevice to cause a denial of service (system crash). (CVE-2023-1079)Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and OleksiiOleksenko discovered that some AMD processors could leak stale data fromdivision operations in certain situations. A local attacker could possiblyuse this to expose sensitive information. (CVE-2023-20588)It was discovered that a race condition existed in the Linux kernel whenperforming operations with kernel objects, leading to an out-of-boundswrite. A local attacker could use this to cause a denial of service (systemcrash) or execute arbitrary code. (CVE-2023-45863)It was discovered that the CIFS network file system implementation in theLinux kernel did not properly validate the server frame size in certainsituation, leading to an out-of-bounds read vulnerability. An attackercould use this to construct a malicious CIFS image that, when operated on,could cause a denial of service (system crash) or possibly expose sensitiveinformation. (CVE-2023-6606)Budimir Markovic, Lucas De Marchi, and Pengfei Xu discovered that the perfsubsystem in the Linux kernel did not properly validate all event sizeswhen attaching new events, leading to an out-of-bounds write vulnerability.A local attacker could use this to cause a denial of service (system crash)or possibly execute arbitrary code. (CVE-2023-6931)It was discovered that the IGMP protocol implementation in the Linux kernelcontained a race condition, leading to a use-after-free vulnerability. Alocal attacker could use this to cause a denial of service (system crash)or possibly execute arbitrary code. (CVE-2023-6932)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 18.04 LTS (Available with Ubuntu Pro):   linux-image-4.15.0-1173-azure   4.15.0-1173.188   linux-image-azure-lts-18.04     4.15.0.1173.141Ubuntu 16.04 LTS (Available with Ubuntu Pro):   linux-image-4.15.0-1173-azure   4.15.0-1173.188~16.04.1   linux-image-azure               4.15.0.1173.157Ubuntu 14.04 LTS (Available with Ubuntu Pro):   linux-image-4.15.0-1173-azure   4.15.0-1173.188~14.04.1   linux-image-azure               4.15.0.1173.139After a standard system update you need to reboot your computer to makeall the necessary changes.ATTENTION: Due to an unavoidable ABI change the kernel updates havebeen given a new version number, which requires you to recompile andreinstall 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 performthis as well.References:   https://ubuntu.com/security/notices/USN-6604-2   https://ubuntu.com/security/notices/USN-6604-1   CVE-2023-1079, CVE-2023-20588, CVE-2023-45863, CVE-2023-6606,   CVE-2023-6931, CVE-2023-6932

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Ubuntu Security Notice USN-6604-1

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Ubuntu Security Notice USN-6604-1

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Ubuntu Security Notice 6386-3 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-6386-2

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Ubuntu Security Notice USN-6387-2

Ubuntu Security Notice 6387-2 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-6386-1

Ubuntu Security Notice 6386-1 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

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Ubuntu Security Notice 6384-1 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. Lonial Con discovered that the netfilter subsystem in the Linux kernel contained a memory leak when handling certain element flush operations. A local attacker could use this to expose sensitive information.

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Debian Linux Security Advisory 5492-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

Debian Security Advisory 5480-1

Debian Linux Security Advisory 5480-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

Ubuntu Security Notice USN-6256-1

Ubuntu Security Notice 6256-1 - Jiasheng Jiang discovered that the HSA Linux kernel driver for AMD Radeon GPU devices did not properly validate memory allocation in certain situations, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service. Zheng Wang discovered that the Intel i915 graphics driver in the Linux kernel did not properly handle certain error conditions, leading to a double-free. A local attacker could possibly use this to cause a denial of service.

Ubuntu Security Notice USN-6223-1

Ubuntu Security Notice 6223-1 - It was discovered that the TUN/TAP driver in the Linux kernel did not properly initialize socket data. A local attacker could use this to cause a denial of service. It was discovered that the Real-Time Scheduling Class implementation in the Linux kernel contained a type confusion vulnerability in some situations. A local attacker could use this to cause a denial of service.

Ubuntu Security Notice USN-6222-1

Ubuntu Security Notice 6222-1 - Jiasheng Jiang discovered that the HSA Linux kernel driver for AMD Radeon GPU devices did not properly validate memory allocation in certain situations, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service. Zheng Wang discovered that the Intel i915 graphics driver in the Linux kernel did not properly handle certain error conditions, leading to a double-free. A local attacker could possibly use this to cause a denial of service.

Ubuntu Security Notice USN-6207-1

Ubuntu Security Notice 6207-1 - It was discovered that the TUN/TAP driver in the Linux kernel did not properly initialize socket data. A local attacker could use this to cause a denial of service. It was discovered that the Real-Time Scheduling Class implementation in the Linux kernel contained a type confusion vulnerability in some situations. A local attacker could use this to cause a denial of service.

Ubuntu Security Notice USN-6187-1

Ubuntu Security Notice 6187-1 - William Zhao discovered that the Traffic Control subsystem in the Linux kernel did not properly handle network packet retransmission in certain situations. A local attacker could use this to cause a denial of service. It was discovered that the TUN/TAP driver in the Linux kernel did not properly initialize socket data. A local attacker could use this to cause a denial of service.

Ubuntu Security Notice USN-6185-1

Ubuntu Security Notice 6185-1 - It was discovered that the TUN/TAP driver in the Linux kernel did not properly initialize socket data. A local attacker could use this to cause a denial of service. It was discovered that the Real-Time Scheduling Class implementation in the Linux kernel contained a type confusion vulnerability in some situations. A local attacker could use this to cause a denial of service.

Ubuntu Security Notice USN-6033-1

Ubuntu Security Notice 6033-1 - It was discovered that the Traffic-Control Index implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for thisCVE, kernel support for the TCINDEX classifier has been removed. William Zhao discovered that the Traffic Control subsystem in the Linux kernel did not properly handle network packet retransmission in certain situations. A local attacker could use this to cause a denial of service.

CVE-2023-1079

A flaw was found in the Linux kernel. A use-after-free may be triggered in asus_kbd_backlight_set when plugging/disconnecting in a malicious USB device, which advertises itself as an Asus device. Similarly to the previous known CVE-2023-25012, but in asus devices, the work_struct may be scheduled by the LED controller while the device is disconnecting, triggering a use-after-free on the struct asus_kbd_leds *led structure. A malicious USB device may exploit the issue to cause memory corruption with controlled data.

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