Citrix Hypervisor Security Update

Description of Problem A security issue has been identified in certain CPU hardware that may allow unprivileged code running on a CPU core to infer the value of memory data belonging to other processes, virtual machines or the hypervisor that are, or have recently been, running on the same CPU...

Multiple Intel Processors Side Channel CVE-2019-11135 Information Disclosure Vulnerability

Description Multiple Intel Processors are prone to a local information-disclosure vulnerability. A local attacker can leverage this issue to obtain sensitive information that may aid in further attacks. Technologies Affected Citrix Hypervisor 8.0 Citrix XenServer 7.0 Citrix XenServer 7.1 LTSR CU2...

Oracle VirtualBox Out-Of-Bounds Write Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Oracle VirtualBox. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the...

Oracle VirtualBox shader_get_registers_used Out-Of-Bounds Write Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Oracle VirtualBox. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the...

Oracle VirtualBox Out-Of-Bounds Write Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Oracle VirtualBox. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the...

Low: Red Hat Security Advisory: osinfo-db and libosinfo security and bug fix update

An update for osinfo-db, osinfo-db-tools, libosinfo, and gnome-boxes is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, i...

Kernel: KVM: leak of uninitialized stack contents to guest

An information leakage issue was found in the way Linux kernel's KVM hypervisor handled page fault exceptions while emulating instructions like VMXON, VMCLEAR, VMPTRLD, and VMWRITE with memory address as an operand. It occurs if the operand is a mmio address, as the returned exception object hold...

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...

ALPINE-CVE-2019-18422

An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service or gain privileges by leveraging the erroneous enabling of interrupts. Interrupts are unconditionally unmasked in exception handlers. When an exception occurs on an ARM system which is handled...

DEBIAN-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-2019-18420

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...

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...

UBUNTU-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...

Format string

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...

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...

add-to-physmap can be abused to DoS Arm hosts

ISSUE DESCRIPTION p2m-maxmappedgfn is used by the functions p2mresolvetranslationfault and p2mgetentry to sanity check guest physical frame. The rest of the code in the two functions will assume that there is a valid root table and check that with BUGON. The function p2mgetrootpointer will ignore...

Citrix Hypervisor Security Update

Description of Problem A number of vulnerabilities have been found in Citrix Hypervisor formerly Citrix XenServer that allow the host to be compromised by: i. Privileged code in a guest VM that has been assigned a PCI passthrough device ii. Privileged code in a PV guest VM iii. Unprivileged code ...

Xen CVE-2019-18423 Denial of Service Vulnerability

Description Xen is prone to a denial-of-service vulnerability. An attacker can exploit this issue to crash hypervisor, denying service to legitimate users. Xen version 4.8 and later are vulnerable. Technologies Affected Xen Xen 4.10 Xen Xen 4.10.0 Xen Xen 4.10.1 Xen Xen 4.10.2 Xen Xen 4.11.0 Xen...

Xen CVE-2019-18424 Privilege Escalation Vulnerability

Description Xen is prone to a privilege-escalation vulnerability. An attacker can exploit this issue to gain elevated privileges on the affected system. Technologies Affected Citrix Hypervisor 8.0 Citrix XenServer 7.0 Citrix XenServer 7.1 LTSR CU2 Citrix XenServer 7.6 Xen Xen 3.2.0 Xen Xen 3.2.1...

Xen CVE-2019-18425 Privilege Escalation Vulnerability

Description Xen is prone to a privilege-escalation vulnerability. An attacker can exploit this issue to gain elevated privileges, obtain sensitive information or cause denial-of-service conditions. Technologies Affected Citrix Hypervisor 8.0 Citrix XenServer 7.0 Citrix XenServer 7.1 LTSR CU2 Citr...