ALPINE-CVE-2020-25602

An issue was discovered in Xen through 4.14.x. An x86 PV guest can trigger a host OS crash when handling guest access to MSRMISCENABLE. When a guest accesses certain Model Specific Registers, Xen first reads the value from hardware to use as the basis for auditing the guest access. For the...

UBUNTU-CVE-2020-25602

An issue was discovered in Xen through 4.14.x. An x86 PV guest can trigger a host OS crash when handling guest access to MSRMISCENABLE. When a guest accesses certain Model Specific Registers, Xen first reads the value from hardware to use as the basis for auditing the guest access. For the...

Xen Cross-Site Scripting Vulnerability

Xen is an open source virtual machine monitor product from the University of Cambridge, UK. The product enables different and incompatible operating systems to run on the same computer and supports runtime migration to ensure uptime and avoid downtime. A security vulnerability exists in Xen versi...

UBUNTU-CVE-2020-15852

An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because tssinvalidateiobitmap mishandling causes a loss of synchronization between the I/O bitmaps ...

The vulnerability of Xen hypervisors relates to the insecure management of privileges, which allows attackers to gain access to confidential data, compromise its integrity, and cause service failures.

The vulnerability of Xen hypervisors is related to an emulation error in PV x86, where there is no check for the limit on the descriptor table. Exploiting this vulnerability can allow a remote attacker to access confidential data, compromise its integrity, and cause service failures...

DEBIAN-CVE-2019-19578

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via degenerate chains of linear pagetables, because of an incorrect fix for CVE-2017-15595. "Linear pagetables" is a technique which involves either pointing a pagetable at itself, or to...

DEBIAN-CVE-2019-19580

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type...

ALPINE-CVE-2019-18420

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via a VCPUOPinitialise hypercall. hypercallcreatecontinuation is a variadic function which uses a printf-like format string to interpret its parameters. Error handling for a bad format...

ALPINE-CVE-2019-18421

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations. There are issues with restartable PV type change operations. To avoid using shadow pagetables for PV guests, Xen...

UBUNTU-CVE-2019-18425

An issue was discovered in Xen through 4.12.x allowing 32-bit PV guest OS users to gain guest OS privileges by installing and using descriptors. There is missing descriptor table limit checking in x86 PV emulation. When emulating certain PV guest operations, descriptor table accesses are performe...

UBUNTU-CVE-2019-18421

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations. There are issues with restartable PV type change operations. To avoid using shadow pagetables for PV guests, Xen...

DEBIAN-CVE-2019-17343

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges by leveraging incorrect use of the HVM physmap concept for PV domains...

ALPINE-CVE-2019-17343

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges by leveraging incorrect use of the HVM physmap concept for PV domains...

UBUNTU-CVE-2019-17341

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges by leveraging a page-writability race condition during addition of a passed-through PCI device...

Xen Denial of Service Vulnerability (CNVD-2019-34768)

Xen is an open source virtual machine monitor product. Xen has a denial of service vulnerability that can be exploited by x86 PV client OS attackers to cause a denial of service or gain privileges...

Xen Denial of Service Vulnerability (CNVD-2019-34759)

Xen is an open source virtual machine monitor product. Xen has a denial of service vulnerability that can be exploited by x86 PV client OS attackers to cause a denial of service...

Xen Denial of Service Vulnerability (CNVD-2019-34761)

Xen is an open source virtual machine monitor product. Xen has a denial of service vulnerability that can be exploited by x86 PV client OS attackers to cause a denial of service or gain privileges...

Xen Denial of Service Vulnerability (CNVD-2019-34769)

Xen is an open source virtual machine monitor product. Xen has a denial of service vulnerability that can be exploited by x86 PV client OS attackers to cause a denial of service or gain privileges...

PT-2019-5143 · Xen +1 · Xen +1

Name of the Vulnerable Software and Affected Versions: Xen versions prior to 4.12 Description: The issue allows x86 PV guest OS users to cause a denial of service or gain privileges because a guest can manipulate its virtualised %cr4 in a way that is incompatible with Linux. This is related to an...

kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests

It was found that paravirtpatchcall/jump functions in the arch/x86/kernel/paravirt.c in the Linux kernel mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtualized guests...