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XEN : Security Vulnerabilities (CVSS score between 7 and 7.99)

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# CVE ID CWE ID # of Exploits Vulnerability Type(s) Publish Date Update Date Score Gained Access Level Access Complexity Authentication Conf. Integ. Avail.
1 CVE-2018-14678 264 DoS +Priv 2018-07-28 2018-10-04
7.2
 None Local Low Not required Complete Complete Complete
An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges.
2 CVE-2018-10982 264 DoS +Priv 2018-05-10 2018-10-31
7.2
 None Local Low Not required Complete Complete Complete
An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users to cause a denial of service (unexpectedly high interrupt number, array overrun, and hypervisor crash) or possibly gain hypervisor privileges by setting up an HPET timer to deliver interrupts in IO-APIC mode, aka vHPET interrupt injection.
3 CVE-2018-8897 264 2018-05-08 2018-11-30
7.2
 None Local Low Not required Complete Complete Complete
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.
4 CVE-2017-17045 264 DoS +Priv +Info 2017-11-28 2018-10-30
7.2
 None Local Low Not required Complete Complete Complete
An issue was discovered in Xen through 4.9.x allowing HVM guest OS users to gain privileges on the host OS, obtain sensitive information, or cause a denial of service (BUG and host OS crash) by leveraging the mishandling of Populate on Demand (PoD) Physical-to-Machine (P2M) errors.
5 CVE-2017-15595 400 DoS +Priv 2017-10-18 2018-10-30
7.2
 None Local Low Not required Complete Complete Complete
An issue was discovered in Xen through 4.9.x allowing x86 PV guest OS users to cause a denial of service (unbounded recursion, stack consumption, and hypervisor crash) or possibly gain privileges via crafted page-table stacking.
6 CVE-2017-15592 264 DoS +Priv 2017-10-18 2018-10-30
7.2
 None Local Low Not required Complete Complete Complete
An issue was discovered in Xen through 4.9.x allowing x86 HVM guest OS users to cause a denial of service (hypervisor crash) or possibly gain privileges because self-linear shadow mappings are mishandled for translated guests.
7 CVE-2017-14319 264 2017-09-12 2018-10-19
7.2
 None Local Low Not required Complete Complete Complete
A grant unmapping issue was discovered in Xen through 4.9.x. When removing or replacing a grant mapping, the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly, neither the presence of the mapping nor page writability were taken into account.
8 CVE-2017-14316 125 2017-09-12 2018-10-19
7.2
 None Local Low Not required Complete Complete Complete
A parameter verification issue was discovered in Xen through 4.9.x. The function `alloc_heap_pages` allows callers to specify the first NUMA node that should be used for allocations through the `memflags` parameter; the node is extracted using the `MEMF_get_node` macro. While the function checks to see if the special constant `NUMA_NO_NODE` is specified, it otherwise does not handle the case where `node >= MAX_NUMNODES`. This allows an out-of-bounds access to an internal array.
9 CVE-2017-12137 264 +Priv 2017-08-24 2018-01-15
7.2
 None Local Low Not required Complete Complete Complete
arch/x86/mm.c in Xen allows local PV guest OS users to gain host OS privileges via vectors related to map_grant_ref.
10 CVE-2017-12134 264 DoS +Priv +Info 2017-08-24 2018-05-30
7.2
 None Local Low Not required Complete Complete Complete
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.
11 CVE-2017-10913 264 +Priv +Info 2017-07-04 2017-11-03
7.5
 None Remote Low Not required Partial Partial Partial
The grant-table feature in Xen through 4.8.x provides false mapping information in certain cases of concurrent unmap calls, which allows backend attackers to obtain sensitive information or gain privileges, aka XSA-218 bug 1.
12 CVE-2017-8903 264 Exec Code 2017-05-11 2017-07-10
7.2
 None Local Low Not required Complete Complete Complete
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.
13 CVE-2017-7228 284 2017-04-04 2017-11-03
7.2
 None Local Low Not required Complete Complete Complete
An issue (known as XSA-212) was discovered in Xen, with fixes available for 4.8.x, 4.7.x, 4.6.x, 4.5.x, and 4.4.x. The earlier XSA-29 fix introduced an insufficient check on XENMEM_exchange input, allowing the caller to drive hypervisor memory accesses outside of the guest provided input/output arrays.
14 CVE-2016-9383 20 DoS Exec Code +Info 2017-01-23 2017-06-30
7.2
 None Local Low Not required Complete Complete Complete
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.
15 CVE-2016-7154 416 DoS Exec Code +Info 2016-09-21 2017-04-09
7.2
 None Local Low Not required Complete Complete Complete
Use-after-free vulnerability in the FIFO event channel code in Xen 4.4.x allows local guest OS administrators to cause a denial of service (host crash) and possibly execute arbitrary code or obtain sensitive information via an invalid guest frame number.
16 CVE-2016-7093 264 +Priv 2016-09-21 2017-06-30
7.2
 None Local Low Not required Complete Complete Complete
Xen 4.5.3, 4.6.3, and 4.7.x allow local HVM guest OS administrators to overwrite hypervisor memory and consequently gain host OS privileges by leveraging mishandling of instruction pointer truncation during emulation.
17 CVE-2016-6258 284 +Priv 2016-08-02 2017-06-30
7.2
 User Local Low Not required Complete Complete Complete
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.
18 CVE-2016-4480 264 +Priv 2016-05-18 2016-11-30
7.2
 None Local Low Not required Complete Complete Complete
The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.
19 CVE-2016-3960 264 DoS Overflow +Priv 2016-04-19 2016-12-02
7.2
 None Local Low Not required Complete Complete Complete
Integer overflow in the x86 shadow pagetable code in Xen allows local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping.
20 CVE-2016-3157 264 DoS +Priv +Info 2016-04-12 2016-12-02
7.2
 None Local Low Not required Complete Complete Complete
The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
21 CVE-2015-8341 399 DoS 2015-12-17 2017-06-30
7.8
 None Remote Low Not required None None Complete
The libxl toolstack library in Xen 4.1.x through 4.6.x does not properly release mappings of files used as kernels and initial ramdisks when managing multiple domains in the same process, which allows attackers to cause a denial of service (memory and disk consumption) by starting domains.
22 CVE-2015-8338 254 DoS 2015-12-17 2016-12-07
7.2
 None Local Low Not required Complete Complete Complete
Xen 4.6.x and earlier does not properly enforce limits on page order inputs for the (1) XENMEM_increase_reservation, (2) XENMEM_populate_physmap, (3) XENMEM_exchange, and possibly other HYPERVISOR_memory_op suboperations, which allows ARM guest OS administrators to cause a denial of service (CPU consumption, guest reboot, or watchdog timeout and host reboot) and possibly have unspecified other impact via unknown vectors.
23 CVE-2015-7835 20 +Priv 2015-10-30 2018-10-30
7.2
 None Local Low Not required Complete Complete Complete
The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.
24 CVE-2015-5166 264 +Priv 2015-08-12 2018-10-30
7.2
 None Local Low Not required Complete Complete Complete
Use-after-free vulnerability in QEMU in Xen 4.5.x and earlier does not completely unplug emulated block devices, which allows local HVM guest users to gain privileges by unplugging a block device twice.
25 CVE-2015-5154 119 Exec Code Overflow 2015-08-12 2018-10-30
7.2
 None Local Low Not required Complete Complete Complete
Heap-based buffer overflow in the IDE subsystem in QEMU, as used in Xen 4.5.x and earlier, when the container has a CDROM drive enabled, allows local guest users to execute arbitrary code on the host via unspecified ATAPI commands.
26 CVE-2015-4104 264 DoS 2015-06-03 2017-11-14
7.8
 None Remote Low Not required None None Complete
Xen 3.3.x through 4.5.x does not properly restrict access to PCI MSI mask bits, which allows local x86 HVM guest users to cause a denial of service (unexpected interrupt and host crash) via unspecified vectors.
27 CVE-2015-3456 119 DoS Exec Code Overflow 2015-05-13 2018-10-30
7.7
 None Local Network Low Single system Complete Complete Complete
The Floppy Disk Controller (FDC) in QEMU, as used in Xen 4.5.x and earlier and KVM, allows local guest users to cause a denial of service (out-of-bounds write and guest crash) or possibly execute arbitrary code via the (1) FD_CMD_READ_ID, (2) FD_CMD_DRIVE_SPECIFICATION_COMMAND, or other unspecified commands, aka VENOM.
28 CVE-2015-3209 119 Exec Code Overflow 2015-06-15 2018-01-04
7.5
 None Remote Low Not required Partial Partial Partial
Heap-based buffer overflow in the PCNET controller in QEMU allows remote attackers to execute arbitrary code by sending a packet with TXSTATUS_STARTPACKET set and then a crafted packet with TXSTATUS_DEVICEOWNS set.
29 CVE-2015-2751 17 DoS 2015-04-01 2018-10-30
7.1
 None Remote Medium Not required None None Complete
Xen 4.3.x, 4.4.x, and 4.5.x, when using toolstack disaggregation, allows remote domains with partial management control to cause a denial of service (host lock) via unspecified domctl operations.
30 CVE-2015-2151 264 DoS Exec Code Mem. Corr. +Info 2015-03-12 2018-10-30
7.2
 None Local Low Not required Complete Complete Complete
The x86 emulator in Xen 3.2.x through 4.5.x does not properly ignore segment overrides for instructions with register operands, which allows local guest users to obtain sensitive information, cause a denial of service (memory corruption), or possibly execute arbitrary code via unspecified vectors.
31 CVE-2015-0361 DoS 2015-01-07 2018-10-30
7.8
 None Remote Low Not required None None Complete
Use-after-free vulnerability in Xen 4.2.x, 4.3.x, and 4.4.x allows remote domains to cause a denial of service (system crash) via a crafted hypercall during HVM guest teardown.
32 CVE-2014-9030 20 DoS 2014-11-24 2018-10-30
7.1
 None Remote Medium Not required None None Complete
The do_mmu_update function in arch/x86/mm.c in Xen 3.2.x through 4.4.x does not properly manage page references, which allows remote domains to cause a denial of service by leveraging control over an HVM guest and a crafted MMU_MACHPHYS_UPDATE.
33 CVE-2014-3969 264 +Priv 2014-06-05 2018-10-30
7.4
 None Local Network Medium Single system Complete Complete Complete
Xen 4.4.x, when running on an ARM system, does not properly check write permissions on virtual addresses, which allows local guest administrators to gain privileges via unspecified vectors.
34 CVE-2013-6375 264 DoS +Priv 2013-11-23 2018-10-30
7.9
 None Local Network Medium Not required Complete Complete Complete
Xen 4.2.x and 4.3.x, when using Intel VT-d for PCI passthrough, does not properly flush the TLB after clearing a present translation table entry, which allows local guest administrators to cause a denial of service or gain privileges via unspecified vectors related to an "inverted boolean parameter."
35 CVE-2013-2211 264 2013-08-28 2014-12-11
7.4
 None Local Network Medium Single system Complete Complete Complete
The libxenlight (libxl) toolstack library in Xen 4.0.x, 4.1.x, and 4.2.x uses weak permissions for xenstore keys for paravirtualised and emulated serial console devices, which allows local guest administrators to modify the xenstore value via unspecified vectors.
36 CVE-2013-2072 119 DoS Overflow +Priv Mem. Corr. 2013-08-28 2016-12-30
7.4
 None Local Network Medium Single system Complete Complete Complete
Buffer overflow in the Python bindings for the xc_vcpu_setaffinity call in Xen 4.0.x, 4.1.x, and 4.2.x allows local administrators with permissions to configure VCPU affinity to cause a denial of service (memory corruption and xend toolstack crash) and possibly gain privileges via a crafted cpumap.
37 CVE-2013-1432 399 DoS +Priv 2013-08-28 2017-06-29
7.4
 None Local Network Medium Single system Complete Complete Complete
Xen 4.1.x and 4.2.x, when the XSA-45 patch is in place, does not properly maintain references on pages stored for deferred cleanup, which allows local PV guest kernels to cause a denial of service (premature page free and hypervisor crash) or possibly gain privileges via unspecified vectors.
38 CVE-2012-6030 20 DoS 2012-11-23 2017-08-28
7.2
 None Local Low Not required Complete Complete Complete
The do_tmem_op function in the Transcendent Memory (TMEM) in Xen 4.0, 4.1, and 4.2 allow local guest OS users to cause a denial of service (host crash) and possibly have other unspecified impacts via unspecified vectors related to "broken locking checks" in an "error path." NOTE: this issue was originally published as part of CVE-2012-3497, which was too general; CVE-2012-3497 has been SPLIT into this ID and others.
39 CVE-2012-3515 20 +Priv 2012-11-23 2017-06-30
7.2
 None Local Low Not required Complete Complete Complete
Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a "device model's address space."
40 CVE-2012-0217 119 Overflow +Priv 2012-06-12 2018-10-12
7.2
 None Local Low Not required Complete Complete Complete
The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix XenServer 6.0.2 and earlier and other products; Oracle Solaris 11 and earlier; illumos before r13724; Joyent SmartOS before 20120614T184600Z; FreeBSD before 9.0-RELEASE-p3; NetBSD 6.0 Beta and earlier; Microsoft Windows Server 2008 R2 and R2 SP1 and Windows 7 Gold and SP1; and possibly other operating systems, when running on an Intel processor, incorrectly uses the sysret path in cases where a certain address is not a canonical address, which allows local users to gain privileges via a crafted application. NOTE: because this issue is due to incorrect use of the Intel specification, it should have been split into separate identifiers; however, there was some value in preserving the original mapping of the multi-codebase coordinated-disclosure effort to a single identifier.
41 CVE-2011-1763 DoS +Priv 2014-01-07 2015-09-03
7.7
 None Local Network Low Single system Complete Complete Complete
The get_free_port function in Xen allows local authenticated DomU users to cause a denial of service or possibly gain privileges via unspecified vectors involving a new event channel port.
42 CVE-2009-3525 264 2009-10-05 2017-09-18
7.2
 None Local Low Not required Complete Complete Complete
The pyGrub boot loader in Xen 3.0.3, 3.3.0, and Xen-3.3.1 does not support the password option in grub.conf for para-virtualized guests, which allows attackers with access to the para-virtualized guest console to boot the guest or modify the guest's kernel boot parameters without providing the expected password.
Total number of vulnerabilities : 42   Page : 1 (This Page)
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