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Total
19 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2015-7704 | 6 Citrix, Debian, Mcafee and 3 more | 14 Xenserver, Debian Linux, Enterprise Security Manager and 11 more | 2021-11-17 | 5.0 MEDIUM | 7.5 HIGH |
| The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted "KOD" messages. | |||||
| CVE-2016-3710 | 7 Canonical, Citrix, Debian and 4 more | 15 Ubuntu Linux, Xenserver, Debian Linux and 12 more | 2021-08-04 | 7.2 HIGH | 8.8 HIGH |
| The VGA module in QEMU improperly performs bounds checking on banked access to video memory, which allows local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the "Dark Portal" issue. | |||||
| CVE-2016-9381 | 2 Citrix, Qemu | 2 Xenserver, Qemu | 2020-10-23 | 6.9 MEDIUM | 7.5 HIGH |
| Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability. | |||||
| CVE-2017-12135 | 3 Citrix, Debian, Xen | 3 Xenserver, Debian Linux, Xen | 2020-04-14 | 4.6 MEDIUM | 8.8 HIGH |
| Xen allows local OS guest users to cause a denial of service (crash) or possibly obtain sensitive information or gain privileges via vectors involving transitive grants. | |||||
| CVE-2012-4606 | 1 Citrix | 1 Xenserver | 2020-02-03 | 4.6 MEDIUM | 7.8 HIGH |
| Citrix XenServer 4.1, 6.0, 5.6 SP2, 5.6 Feature Pack 1, 5.6 Common Criteria, 5.6, 5.5, 5.0, and 5.0 Update 3 contains a Local Privilege Escalation Vulnerability which could allow local users with access to a guest operating system to gain elevated privileges. | |||||
| CVE-2018-19962 | 3 Citrix, Debian, Xen | 3 Xenserver, Debian Linux, Xen | 2019-10-03 | 6.9 MEDIUM | 7.8 HIGH |
| An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because small IOMMU mappings are unsafely combined into larger ones. | |||||
| CVE-2017-12137 | 3 Citrix, Debian, Xen | 3 Xenserver, Debian Linux, Xen | 2019-10-03 | 7.2 HIGH | 8.8 HIGH |
| arch/x86/mm.c in Xen allows local PV guest OS users to gain host OS privileges via vectors related to map_grant_ref. | |||||
| CVE-2018-19961 | 3 Citrix, Debian, Xen | 3 Xenserver, Debian Linux, Xen | 2019-10-03 | 6.9 MEDIUM | 7.8 HIGH |
| An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes. | |||||
| CVE-2018-8897 | 8 Apple, Canonical, Citrix and 5 more | 11 Mac Os X, Ubuntu Linux, Xenserver and 8 more | 2019-10-03 | 7.2 HIGH | 7.8 HIGH |
| A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs. | |||||
| CVE-2017-12134 | 2 Citrix, Xen | 2 Xenserver, Xen | 2019-10-03 | 7.2 HIGH | 8.8 HIGH |
| The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation. | |||||
| CVE-2017-12136 | 3 Citrix, Debian, Xen | 3 Xenserver, Debian Linux, Xen | 2019-05-06 | 6.9 MEDIUM | 7.8 HIGH |
| Race condition in the grant table code in Xen 4.6.x through 4.9.x allows local guest OS administrators to cause a denial of service (free list corruption and host crash) or gain privileges on the host via vectors involving maptrack free list handling. | |||||
| CVE-2016-9637 | 1 Citrix | 1 Xenserver | 2018-02-08 | 3.7 LOW | 7.5 HIGH |
| The (1) ioport_read and (2) ioport_write functions in Xen, when qemu is used as a device model within Xen, might allow local x86 HVM guest OS administrators to gain qemu process privileges via vectors involving an out-of-range ioport access. | |||||
| CVE-2016-9380 | 2 Citrix, Xen | 2 Xenserver, Xen | 2017-07-01 | 4.6 MEDIUM | 7.5 HIGH |
| The pygrub boot loader emulator in Xen, when nul-delimited output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via NUL bytes in the bootloader configuration file. | |||||
| CVE-2016-9382 | 2 Citrix, Xen | 2 Xenserver, Xen | 2017-07-01 | 4.6 MEDIUM | 7.8 HIGH |
| Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode. | |||||
| CVE-2016-9383 | 2 Citrix, Xen | 2 Xenserver, Xen | 2017-07-01 | 7.2 HIGH | 8.8 HIGH |
| Xen, when running on a 64-bit hypervisor, allows local x86 guest OS users to modify arbitrary memory and consequently obtain sensitive information, cause a denial of service (host crash), or execute arbitrary code on the host by leveraging broken emulation of bit test instructions. | |||||
| CVE-2016-9386 | 2 Citrix, Xen | 2 Xenserver, Xen | 2017-07-01 | 4.6 MEDIUM | 7.8 HIGH |
| The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values. | |||||
| CVE-2016-9379 | 2 Citrix, Xen | 2 Xenserver, Xen | 2017-07-01 | 4.6 MEDIUM | 7.9 HIGH |
| The pygrub boot loader emulator in Xen, when S-expression output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via string quotes and S-expressions in the bootloader configuration file. | |||||
| CVE-2016-6258 | 2 Citrix, Xen | 2 Xenserver, Xen | 2017-07-01 | 7.2 HIGH | 8.8 HIGH |
| The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries. | |||||
| CVE-2015-8555 | 2 Citrix, Xen | 2 Xenserver, Xen | 2017-07-01 | 5.0 MEDIUM | 8.6 HIGH |
| Xen 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors. | |||||