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XEN : Security Vulnerabilities (CVSS score >= 9)
| # |
CVE ID
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CWE ID
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# of Exploits
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Vulnerability Type(s)
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Publish Date
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Update Date
|
Score
|
Gained Access Level
|
Access
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Complexity
|
Authentication
|
Conf.
|
Integ.
|
Avail.
|
|
1 |
CVE-2019-18425 |
269 |
|
+Priv |
2019-10-31 |
2019-11-14 |
9.3 |
None |
Remote |
Medium |
Not required |
Complete |
Complete |
Complete |
|
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 performed by the emulating code. Such accesses should respect the guest specified limits, unless otherwise guaranteed to fail in such a case. Without this, emulation of 32-bit guest user mode calls through call gates would allow guest user mode to install and then use descriptors of their choice, as long as the guest kernel did not itself install an LDT. (Most OSes don't install any LDT by default). 32-bit PV guest user mode can elevate its privileges to that of the guest kernel. Xen versions from at least 3.2 onwards are affected. Only 32-bit PV guest user mode can leverage this vulnerability. HVM, PVH, as well as 64-bit PV guests cannot leverage this vulnerability. Arm systems are unaffected. |
|
2 |
CVE-2017-15597 |
119 |
|
DoS Overflow Mem. Corr. +Info |
2017-10-30 |
2019-10-03 |
9.0 |
None |
Remote |
Low |
??? |
Complete |
Complete |
Complete |
|
An issue was discovered in Xen through 4.9.x. Grant copying code made an implication that any grant pin would be accompanied by a suitable page reference. Other portions of code, however, did not match up with that assumption. When such a grant copy operation is being done on a grant of a dying domain, the assumption turns out wrong. A malicious guest administrator can cause hypervisor memory corruption, most likely resulting in host crash and a Denial of Service. Privilege escalation and information leaks cannot be ruled out. |
|
3 |
CVE-2017-10921 |
119 |
|
DoS Overflow Mem. Corr. |
2017-07-05 |
2019-10-03 |
10.0 |
None |
Remote |
Low |
Not required |
Complete |
Complete |
Complete |
|
The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 2. |
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4 |
CVE-2017-10920 |
119 |
|
DoS Overflow Mem. Corr. |
2017-07-05 |
2019-10-03 |
10.0 |
None |
Remote |
Low |
Not required |
Complete |
Complete |
Complete |
|
The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host_map unmapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 1. |
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5 |
CVE-2017-10918 |
20 |
|
|
2017-07-05 |
2017-11-04 |
10.0 |
None |
Remote |
Low |
Not required |
Complete |
Complete |
Complete |
|
Xen through 4.8.x does not validate memory allocations during certain P2M operations, which allows guest OS users to obtain privileged host OS access, aka XSA-222. |
|
6 |
CVE-2017-10917 |
476 |
|
DoS +Info |
2017-07-05 |
2017-11-04 |
9.4 |
None |
Remote |
Low |
Not required |
Complete |
None |
Complete |
|
Xen through 4.8.x does not validate the port numbers of polled event channel ports, which allows guest OS users to cause a denial of service (NULL pointer dereference and host OS crash) or possibly obtain sensitive information, aka XSA-221. |
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7 |
CVE-2017-10912 |
|
|
|
2017-07-05 |
2019-10-03 |
10.0 |
None |
Remote |
Low |
Not required |
Complete |
Complete |
Complete |
|
Xen through 4.8.x mishandles page transfer, which allows guest OS users to obtain privileged host OS access, aka XSA-217. |
|
8 |
CVE-2017-2620 |
125 |
|
Exec Code |
2018-07-27 |
2021-08-04 |
9.0 |
None |
Remote |
Low |
??? |
Complete |
Complete |
Complete |
|
Quick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process. |
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9 |
CVE-2017-2615 |
125 |
|
Exec Code |
2018-07-03 |
2021-08-04 |
9.0 |
None |
Remote |
Low |
??? |
Complete |
Complete |
Complete |
|
Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host. |
|
10 |
CVE-2015-5165 |
908 |
|
|
2015-08-12 |
2022-02-11 |
9.3 |
None |
Remote |
Medium |
Not required |
Complete |
Complete |
Complete |
|
The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used in Xen 4.5.x and earlier, allows remote attackers to read process heap memory via unspecified vectors. |
Total number of vulnerabilities : 10
Page :
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