Описание
Security update for xen
This update for xen fixes the following issues:
Security fixes:
- CVE-2024-31145: Fixed error handling in x86 IOMMU identity mapping (XSA-460) (bsc#1228574)
- CVE-2024-31146: Fixed PCI device pass-through with shared resources (XSA-461) (bsc#1228575)
- CVE-2024-45817: Fixed Deadlock in vlapic_error() (XSA-462) (bsc#1230366)
Other fixes:
- Upstream bug fixes (bsc#1027519)
Список пакетов
Image SLES12-SP5-EC2-BYOS
Image SLES12-SP5-EC2-ECS-On-Demand
Image SLES12-SP5-EC2-On-Demand
Image SLES12-SP5-EC2-SAP-BYOS
Image SLES12-SP5-EC2-SAP-On-Demand
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
SUSE Linux Enterprise Software Development Kit 12 SP5
Ссылки
- Link for SUSE-SU-2024:3586-1
- E-Mail link for SUSE-SU-2024:3586-1
- SUSE Security Ratings
- SUSE Bug 1027519
- SUSE Bug 1228574
- SUSE Bug 1228575
- SUSE Bug 1230366
- SUSE CVE CVE-2024-31145 page
- SUSE CVE CVE-2024-31146 page
- SUSE CVE CVE-2024-45817 page
Описание
Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. In the logic establishing these mappings, error handling was flawed, resulting in such mappings to potentially remain in place when they should have been removed again. Respective guests would then gain access to memory regions which they aren't supposed to have access to.
Затронутые продукты
Ссылки
- CVE-2024-31145
- SUSE Bug 1228574
Описание
When multiple devices share resources and one of them is to be passed through to a guest, security of the entire system and of respective guests individually cannot really be guaranteed without knowing internals of any of the involved guests. Therefore such a configuration cannot really be security-supported, yet making that explicit was so far missing. Resources the sharing of which is known to be problematic include, but are not limited to - - PCI Base Address Registers (BARs) of multiple devices mapping to the same page (4k on x86), - - INTx lines.
Затронутые продукты
Ссылки
- CVE-2024-31146
- SUSE Bug 1228575
Описание
In x86's APIC (Advanced Programmable Interrupt Controller) architecture, error conditions are reported in a status register. Furthermore, the OS can opt to receive an interrupt when a new error occurs. It is possible to configure the error interrupt with an illegal vector, which generates an error when an error interrupt is raised. This case causes Xen to recurse through vlapic_error(). The recursion itself is bounded; errors accumulate in the the status register and only generate an interrupt when a new status bit becomes set. However, the lock protecting this state in Xen will try to be taken recursively, and deadlock.
Затронутые продукты
Ссылки
- CVE-2024-45817
- SUSE Bug 1230366