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CVE-2020-15565

Quick assessment

Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Xen是英国剑桥大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 4.13.x及之前版本中存在安全漏洞。攻击者可利用该漏洞导致主机操作系统崩溃或提升权限。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.37% · P30

Possible ATT&CK Techniques 1 AI

T1548.001 · Setuid and Setgid
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I. Basic Information for CVE-2020-15565

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in Xen through 4.13.x, allowing x86 Intel HVM guest OS users to cause a host OS denial of service or possibly gain privileges because of insufficient cache write-back under VT-d. When page tables are shared between IOMMU and CPU, changes to them require flushing of both TLBs. Furthermore, IOMMUs may be non-coherent, and hence prior to flushing IOMMU TLBs, a CPU cache also needs writing back to memory after changes were made. Such writing back of cached data was missing in particular when splitting large page mappings into smaller granularity ones. A malicious guest may be able to retain read/write DMA access to frames returned to Xen's free pool, and later reused for another purpose. Host crashes (leading to a Denial of Service) and privilege escalation cannot be ruled out. Xen versions from at least 3.2 onwards are affected. Only x86 Intel systems are affected. x86 AMD as well as Arm systems are not affected. Only x86 HVM guests using hardware assisted paging (HAP), having a passed through PCI device assigned, and having page table sharing enabled can leverage the vulnerability. Note that page table sharing will be enabled (by default) only if Xen considers IOMMU and CPU large page size support compatible.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Xen 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xen是英国剑桥大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 4.13.x及之前版本中存在安全漏洞。攻击者可利用该漏洞导致主机操作系统崩溃或提升权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- n/a n/a -

II. Public POCs for CVE-2020-15565

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III. Intelligence Information for CVE-2020-15565

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Vendor Advisories for CVE-2020-15565 (2)

Mailing List Discussions for CVE-2020-15565 (5)

Same Patch Batch · n/a · 2020-07-07 · 52 CVEs total

CVE-2020-15580 Samsung移动设备安全漏洞
CVE-2020-15507 MobileIron Core 信息泄露漏洞
CVE-2020-15506 MobileIron Core 授权问题漏洞
CVE-2020-15567 Xen 竞争条件问题漏洞
CVE-2020-15566 Xen 代码问题漏洞
CVE-2020-15563 Xen 缓冲区错误漏洞
CVE-2020-15564 Xen 缓冲区错误漏洞
CVE-2020-15505 多款MobileIron产品安全漏洞
CVE-2020-15582 Samsung移动设备缓冲区错误漏洞
CVE-2020-15581 Samsung Mobile Device 信息泄露漏洞
CVE-2020-15583 Samsung移动设备路径遍历漏洞
CVE-2020-15579 Samsung移动设备安全漏洞
CVE-2020-15578 Samsung移动设备安全漏洞
CVE-2020-10745 Samba 资源管理错误漏洞
CVE-2020-15577 Samsung移动设备安全漏洞
CVE-2020-10730 Samba 资源管理错误漏洞
CVE-2020-15517 TYPO3 ke_search extension 跨站脚本漏洞
CVE-2020-15516 TYPO3 mm_forum extension 跨站请求伪造漏洞
CVE-2020-15514 TYPO3 jh_captcha extension 跨站脚本漏洞
CVE-2020-15513 TYPO3 typo3_forum extension 安全漏洞

Showing top 20 of 52 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2020-15565

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