SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2021:1028-1)

This update for xen fixes the following issues : CVE-2021-3308: VUL-0: xen: IRQ vector leak on x86 bsc1181254, XSA-360 CVE-2021-28687: HVM soft-reset crashes toolstack bsc1183072, XSA-368 L3: conring size for XEN HV's with huge memory to small. Inital Xen logs cut bsc1177204 L3: XEN domU crashed ...

SUSE-SU-2021:1028-1 Security update for xen

This update for xen fixes the following issues: - CVE-2021-3308: VUL-0: xen: IRQ vector leak on x86 bsc1181254, XSA-360 - CVE-2021-28687: HVM soft-reset crashes toolstack bsc1183072, XSA-368 - L3: conring size for XEN HV's with huge memory to small. Inital Xen logs cut bsc1177204 - L3: XEN domU...

SUSE-SU-2021:1023-1 Security update for xen

This update for xen fixes the following issues: - CVE-2021-3308: VUL-0: xen: IRQ vector leak on x86 bsc1181254, XSA-360 - CVE-2021-28687: VUL-0: xen: HVM soft-reset crashes toolstack bsc1183072, XSA-368 - CVE-2021-20257: VUL-0: xen: infinite loop issue in the e1000 NIC emulator bsc1182846 -...

Fedora 32 : xen (2021-a468f36bbe)

The remote Fedora 32 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2021-a468f36bbe advisory. - HVM soft-reset crashes toolstack XSA-368 CVE-2021-28687 - HVM soft-reset crashes toolstack XSA-368 fedora-all CVE-2021-28687 Note that Nessus has...

Fedora 32 : kernel (2021-8d45d297c6)

The remote Fedora 32 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2021-8d45d297c6 advisory. - An issue was discovered in the Linux kernel 3.11 through 5.10.16, as used by Xen. To service requests to the PV backend, the driver maps grant...

Denial Of Service (DoS)

Xen is vulnerable to Denial of Service DoS. 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...

FreeBSD -- Xen grant mapping error handling issues

Problem Description: Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one reported to the backend driver, and the backend driver then loops over the results, performing follow-up actions based on...

Debian DLA-2560-1 : qemu security update

Several vulnerabilities were discovered in QEMU, a fast processor emulator notably used in KVM and Xen HVM virtualization. An attacker could trigger a denial of service DoS, information leak, and possibly execute arbitrary code with the privileges of the QEMU process on the host. CVE-2020-15469 A...

CVE-2021-27379

An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service host OS crash or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct...

CVE-2021-27379

An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service host OS crash or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct...

CVE-2021-27379

An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service host OS crash or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct...

Design/Logic Flaw

An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service host OS crash or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct...

CVE-2021-27379

CVE-2021-27379 affects Xen 4.11.x and related Xen/Citrix Hypervisor deployments. The issue arises from an incomplete backport that missed a flush, causing IOMMU updates to be incorrect and enabling x86 Intel HVM guests with PCI passthrough to achieve unintended read/write DMA, potentially leading...

CVE-2021-27379

An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service host OS crash or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct...

CVE-2021-27379: Undefined Security Weakness

An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service host OS crash or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct...

CVE-2021-26932

An issue was discovered in the Linux kernel 3.2 through 5.10.16, as used by Xen. Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one is reported to the backend driver, and the backend driver then...

Design/Logic Flaw

An issue was discovered in the Linux kernel 3.2 through 5.10.16, as used by Xen. Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one is reported to the backend driver, and the backend driver then...

CVE-2021-26932

An issue was discovered in the Linux kernel 3.2 through 5.10.16, as used by Xen. Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one is reported to the backend driver, and the backend driver then...

Fedora 32 : xen (2021-16c9c40d4d)

The remote Fedora 32 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2021-16c9c40d4d advisory. - 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...

CVE-2021-3308

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...