Missing alignment check in VCPUOP_register_vcpu_info

ISSUE DESCRIPTION The hypercall VCPUOPregistervcpuinfo is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions which require a specific alignment...

PT-2020-5907 · Xen +2 · Xen +2

Name of the Vulnerable Software and Affected Versions: Xen versions through 4.13.x Description: An issue in Xen allows Arm guest OS users to cause a hypervisor crash due to a missing alignment check in the VCPUOP register vcpu info hypercall. This hypercall is used by a guest to register a shared...

ALPINE-CVE-2020-11739

An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service or possibly gain privileges because of missing memory barriers in read-write unlock paths. The read-write unlock paths don't contain a memory barrier. On Arm, this means a processor is allowed to...

The vulnerability of the hypercall_initialise function in Xen hypervisors, related to insufficient validation of input data, allows a malicious actor to trigger a service failure.

The vulnerability of the hypercallinitialise function in Xen hypervisors is related to incorrect error handling for the invalid format symbol. Exploiting this vulnerability can allow a malicious actor to cause service failures...

Xen Denial of Service Vulnerability (XSA-301)

According to its self-reported version number, the Xen Hypervisor installed on the remote host is affected by a denial of service vulnerability due to improper validation of input data. An authenticated, remote attack can exploit this, via a specially crafted hypercall followed by an access to an...

DEBIAN-CVE-2019-18423

An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service via a XENMEMaddtophysmap hypercall. p2m-maxmappedgfn is used by the functions p2mresolvetranslationfault and p2mgetentry to sanity check guest physical frame. The rest of the code in the two...

Design/Logic Flaw

An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service via a XENMEMaddtophysmap hypercall. p2m-maxmappedgfn is used by the functions p2mresolvetranslationfault and p2mgetentry to sanity check guest physical frame. The rest of the code in the two...

CVE-2019-18423

CVE-2019-18423 concerns the Xen hypervisor vulnerability affecting ARM guests via XENMEM_add_to_physmap in Xen 4.12.x and earlier. The issue stems from p2m handling: p2m->max_mapped_gfn is used to sanity-check guest frames in p2m_resolve_translation_fault() and p2m_get_entry(), while p2m_get_r...

CVE-2019-18423

An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service via a XENMEMaddtophysmap hypercall. p2m-maxmappedgfn is used by the functions p2mresolvetranslationfault and p2mgetentry to sanity check guest physical frame. The rest of the code in the two...

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...

VCPUOP_initialise DoS

ISSUE DESCRIPTION hypercallcreatecontinuation is a variadic function which uses a printf-like format string to interpret its parameters. Error handling for a bad format character was done using BUG, which crashes Xen. One path, via the VCPUOPinitialise hypercall, has a bad format character. The B...

PT-2019-4882 · Xen +1 · Xen +1

Name of the Vulnerable Software and Affected Versions: Xen versions 4.6 through 4.12.x Description: The issue is related to incorrect error handling for a malformed format character in the hypercall initialise function of the Xen hypervisor. This can be exploited by a remote attacker to cause a...

openSUSE Security Update : xen (openSUSE-2019-1199)

This update for xen fixes the following issues : Security issues fixed : - CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the host, resulting in a Denial of Service DoS. XSA-282 bsc1114988 - Fixed an issue which could allow malicious PV guests may cause a host crash or gain...

Stale TLB entry due to page type release race

ISSUE DESCRIPTION x86 PV guests effect TLB flushes by way of a hypercall. Xen tries to reduce the number of TLB flushes by delaying them as much as possible. When the last type reference of a page is dropped, the need for a TLB flush before the page is re-used is recorded. If a guest TLB flush...

CVE-2017-8903

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213...

CVE-2017-8903

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213...

CVE-2017-8903

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213...

Code injection

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213...

CVE-2017-8903

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213...

DEBIAN-CVE-2017-8903

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213...