发布于3月6日3月6日 超级管理员 Ubuntu: (Multiple Advisories) (CVE-2024-36950): Linux kernel vulnerabilities Severity 4 CVSS (AV:L/AC:M/Au:N/C:P/I:P/A:P) Published 05/30/2024 Created 08/10/2024 Added 08/09/2024 Modified 01/23/2025 Description In the Linux kernel, the following vulnerability has been resolved: firewire: ohci: mask bus reset interrupts between ISR and bottom half In the FireWire OHCI interrupt handler, if a bus reset interrupt has occurred, mask bus reset interrupts until bus_reset_work has serviced and cleared the interrupt. Normally, we always leave bus reset interrupts masked. We infer the bus reset from the self-ID interrupt that happens shortly thereafter. A scenario where we unmask bus reset interrupts was introduced in 2008 in a007bb857e0b26f5d8b73c2ff90782d9c0972620: If OHCI_PARAM_DEBUG_BUSRESETS (8) is set in the debug parameter bitmask, we will unmask bus reset interrupts so we can log them. irq_handler logs the bus reset interrupt. However, we can't clear the bus reset event flag in irq_handler, because we won't service the event until later. irq_handler exits with the event flag still set. If the corresponding interrupt is still unmasked, the first bus reset will usually freeze the system due to irq_handler being called again each time it exits. This freeze can be reproduced by loading firewire_ohci with "modprobe firewire_ohci debug=-1" (to enable all debugging output). Apparently there are also some cases where bus_reset_work will get called soon enough to clear the event, and operation will continue normally. This freeze was first reported a few months after a007bb85 was committed, but until now it was never fixed. The debug level could safely be set to -1 through sysfs after the module was loaded, but this would be ineffectual in logging bus reset interrupts since they were only unmasked during initialization. irq_handler will now leave the event flag set but mask bus reset interrupts, so irq_handler won't be called again and there will be no freeze. If OHCI_PARAM_DEBUG_BUSRESETS is enabled, bus_reset_work will unmask the interrupt after servicing the event, so future interrupts will be caught as desired. As a side effect to this change, OHCI_PARAM_DEBUG_BUSRESETS can now be enabled through sysfs in addition to during initial module loading. However, when enabled through sysfs, logging of bus reset interrupts will be effective only starting with the second bus reset, after bus_reset_work has executed. Solution(s) ubuntu-upgrade-linux-image-5-15-0-1035-xilinx-zynqmp ubuntu-upgrade-linux-image-5-15-0-1050-gkeop ubuntu-upgrade-linux-image-5-15-0-1060-ibm ubuntu-upgrade-linux-image-5-15-0-1060-raspi ubuntu-upgrade-linux-image-5-15-0-1062-intel-iotg ubuntu-upgrade-linux-image-5-15-0-1062-nvidia ubuntu-upgrade-linux-image-5-15-0-1062-nvidia-lowlatency ubuntu-upgrade-linux-image-5-15-0-1064-gke ubuntu-upgrade-linux-image-5-15-0-1064-kvm ubuntu-upgrade-linux-image-5-15-0-1065-oracle ubuntu-upgrade-linux-image-5-15-0-1066-gcp ubuntu-upgrade-linux-image-5-15-0-1067-aws ubuntu-upgrade-linux-image-5-15-0-1070-azure ubuntu-upgrade-linux-image-5-15-0-1070-azure-fde ubuntu-upgrade-linux-image-5-15-0-118-generic ubuntu-upgrade-linux-image-5-15-0-118-generic-64k ubuntu-upgrade-linux-image-5-15-0-118-generic-lpae ubuntu-upgrade-linux-image-5-15-0-118-lowlatency ubuntu-upgrade-linux-image-5-15-0-118-lowlatency-64k ubuntu-upgrade-linux-image-5-4-0-1042-iot ubuntu-upgrade-linux-image-5-4-0-1049-xilinx-zynqmp ubuntu-upgrade-linux-image-5-4-0-1077-ibm ubuntu-upgrade-linux-image-5-4-0-1090-bluefield ubuntu-upgrade-linux-image-5-4-0-1097-gkeop ubuntu-upgrade-linux-image-5-4-0-1114-raspi ubuntu-upgrade-linux-image-5-4-0-1118-kvm ubuntu-upgrade-linux-image-5-4-0-1129-oracle ubuntu-upgrade-linux-image-5-4-0-1130-aws ubuntu-upgrade-linux-image-5-4-0-1134-gcp ubuntu-upgrade-linux-image-5-4-0-1135-azure ubuntu-upgrade-linux-image-5-4-0-192-generic ubuntu-upgrade-linux-image-5-4-0-192-generic-lpae ubuntu-upgrade-linux-image-5-4-0-192-lowlatency ubuntu-upgrade-linux-image-6-8-0-1008-gke ubuntu-upgrade-linux-image-6-8-0-1009-raspi ubuntu-upgrade-linux-image-6-8-0-1010-ibm ubuntu-upgrade-linux-image-6-8-0-1010-oem ubuntu-upgrade-linux-image-6-8-0-1010-oracle ubuntu-upgrade-linux-image-6-8-0-1010-oracle-64k ubuntu-upgrade-linux-image-6-8-0-1011-nvidia ubuntu-upgrade-linux-image-6-8-0-1011-nvidia-64k 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ubuntu-upgrade-linux-image-generic ubuntu-upgrade-linux-image-generic-64k ubuntu-upgrade-linux-image-generic-64k-hwe-20-04 ubuntu-upgrade-linux-image-generic-64k-hwe-24-04 ubuntu-upgrade-linux-image-generic-hwe-18-04 ubuntu-upgrade-linux-image-generic-hwe-20-04 ubuntu-upgrade-linux-image-generic-hwe-24-04 ubuntu-upgrade-linux-image-generic-lpae ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04 ubuntu-upgrade-linux-image-gke ubuntu-upgrade-linux-image-gke-5-15 ubuntu-upgrade-linux-image-gkeop ubuntu-upgrade-linux-image-gkeop-5-15 ubuntu-upgrade-linux-image-gkeop-5-4 ubuntu-upgrade-linux-image-ibm ubuntu-upgrade-linux-image-ibm-classic ubuntu-upgrade-linux-image-ibm-lts-20-04 ubuntu-upgrade-linux-image-ibm-lts-24-04 ubuntu-upgrade-linux-image-intel ubuntu-upgrade-linux-image-intel-iotg ubuntu-upgrade-linux-image-kvm ubuntu-upgrade-linux-image-lowlatency ubuntu-upgrade-linux-image-lowlatency-64k ubuntu-upgrade-linux-image-lowlatency-64k-hwe-20-04 ubuntu-upgrade-linux-image-lowlatency-hwe-18-04 ubuntu-upgrade-linux-image-lowlatency-hwe-20-04 ubuntu-upgrade-linux-image-nvidia ubuntu-upgrade-linux-image-nvidia-6-8 ubuntu-upgrade-linux-image-nvidia-64k ubuntu-upgrade-linux-image-nvidia-64k-6-8 ubuntu-upgrade-linux-image-nvidia-lowlatency ubuntu-upgrade-linux-image-nvidia-lowlatency-64k ubuntu-upgrade-linux-image-oem ubuntu-upgrade-linux-image-oem-20-04 ubuntu-upgrade-linux-image-oem-20-04b ubuntu-upgrade-linux-image-oem-20-04c ubuntu-upgrade-linux-image-oem-20-04d ubuntu-upgrade-linux-image-oem-24-04 ubuntu-upgrade-linux-image-oem-24-04a ubuntu-upgrade-linux-image-oem-osp1 ubuntu-upgrade-linux-image-oracle ubuntu-upgrade-linux-image-oracle-64k ubuntu-upgrade-linux-image-oracle-lts-20-04 ubuntu-upgrade-linux-image-oracle-lts-22-04 ubuntu-upgrade-linux-image-raspi ubuntu-upgrade-linux-image-raspi-hwe-18-04 ubuntu-upgrade-linux-image-raspi-nolpae ubuntu-upgrade-linux-image-raspi2 ubuntu-upgrade-linux-image-snapdragon-hwe-18-04 ubuntu-upgrade-linux-image-virtual ubuntu-upgrade-linux-image-virtual-hwe-18-04 ubuntu-upgrade-linux-image-virtual-hwe-20-04 ubuntu-upgrade-linux-image-virtual-hwe-24-04 ubuntu-upgrade-linux-image-xilinx-zynqmp References https://attackerkb.com/topics/cve-2024-36950 CVE - 2024-36950 USN-6949-1 USN-6949-2 USN-6950-1 USN-6950-2 USN-6950-3 USN-6950-4 USN-6951-1 USN-6951-2 USN-6951-3 USN-6951-4 USN-6952-1 USN-6952-2 USN-6953-1 USN-6955-1 USN-6956-1 USN-6957-1 USN-6979-1 USN-7019-1 View more
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