Описание
Security update for xen
This update for xen fixes the following issues:
- CVE-2021-3308: VUL-0: xen: IRQ vector leak on x86 (bsc#1181254, XSA-360)
- CVE-2021-28687: VUL-0: xen: HVM soft-reset crashes toolstack (bsc#1183072, XSA-368)
- CVE-2021-20257: VUL-0: xen: infinite loop issue in the e1000 NIC emulator (bsc#1182846)
- CVE-2020-28368: VUL-0: xen: Intel RAPL sidechannel attack aka PLATYPUS attack aka (bsc#1178591, XSA-351)
- L3: conring size for XEN HV's with huge memory to small. Inital Xen logs cut (bsc#1177204)
- Kdump of HVM fails, soft-reset not handled by libxl (bsc#1179148)
- OpenQA job causes libvirtd to dump core when running kdump inside domain (bsc#1181989)
- Allow restart of xenwatchdogd, enable tuning of keep-alive interval and timeout options via XENWATCHDOGD_ARGS= (bsc#1178736)
- The receiving side did detect holes in a to-be-allocated superpage, but allocated a superpage anyway. This resulted to over-allocation (bsc#1177112)
- The receiving side may punch holes incorrectly into optimistically allocated superpages. Also reduce overhead in bitmap handling (bsc#1177112)
- 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-2021:1023-1
- E-Mail link for SUSE-SU-2021:1023-1
- SUSE Security Ratings
- SUSE Bug 1027519
- SUSE Bug 1177112
- SUSE Bug 1177204
- SUSE Bug 1178591
- SUSE Bug 1178736
- SUSE Bug 1179148
- SUSE Bug 1181254
- SUSE Bug 1181989
- SUSE Bug 1182846
- SUSE Bug 1183072
- SUSE CVE CVE-2020-28368 page
- SUSE CVE CVE-2021-20257 page
- SUSE CVE CVE-2021-28687 page
- SUSE CVE CVE-2021-3308 page
Описание
Xen through 4.14.x allows guest OS administrators to obtain sensitive information (such as AES keys from outside the guest) via a side-channel attack on a power/energy monitoring interface, aka a "Platypus" attack. NOTE: there is only one logically independent fix: to change the access control for each such interface in Xen.
Затронутые продукты
Ссылки
- CVE-2020-28368
- SUSE Bug 1178591
- SUSE Bug 1178658
Описание
An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Затронутые продукты
Ссылки
- CVE-2021-20257
- SUSE Bug 1182577
- SUSE Bug 1182846
Описание
HVM soft-reset crashes toolstack libxl requires all data structures passed across its public interface to be initialized before use and disposed of afterwards by calling a specific set of functions. Many internal data structures also require this initialize / dispose discipline, but not all of them. When the "soft reset" feature was implemented, the libxl__domain_suspend_state structure didn't require any initialization or disposal. At some point later, an initialization function was introduced for the structure; but the "soft reset" path wasn't refactored to call the initialization function. When a guest nwo initiates a "soft reboot", uninitialized data structure leads to an assert() when later code finds the structure in an unexpected state. The effect of this is to crash the process monitoring the guest. How this affects the system depends on the structure of the toolstack. For xl, this will have no security-relevant effect: every VM has its own independent monitoring process, which contains no state. The domain in question will hang in a crashed state, but can be destroyed by `xl destroy` just like any other non-cooperating domain. For daemon-based toolstacks linked against libxl, such as libvirt, this will crash the toolstack, losing the state of any in-progress operations (localized DoS), and preventing further administrator operations unless the daemon is configured to restart automatically (system-wide DoS). If crashes "leak" resources, then repeated crashes could use up resources, also causing a system-wide DoS.
Затронутые продукты
Ссылки
- CVE-2021-28687
- SUSE Bug 1183072
Описание
An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host.
Затронутые продукты
Ссылки
- CVE-2021-3308
- SUSE Bug 1181254