CVE-2020-29480
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（Cambridge）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 through 4.14.x 版本存在安全漏洞，该漏洞源于在报告xenstore watch事件时，xenstore实现都不进行任何权限检查。来宾管理员可以监视根xenstored节点，这将导致每个创建、修改和删除密钥的通知。
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I. Basic Information for CVE-2020-29480
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 4.14.x. Neither xenstore implementation does any permission checks when reporting a xenstore watch event. A guest administrator can watch the root xenstored node, which will cause notifications for every created, modified, and deleted key. A guest administrator can also use the special watches, which will cause a notification every time a domain is created and destroyed. Data may include: number, type, and domids of other VMs; existence and domids of driver domains; numbers of virtual interfaces, block devices, vcpus; existence of virtual framebuffers and their backend style (e.g., existence of VNC service); Xen VM UUIDs for other domains; timing information about domain creation and device setup; and some hints at the backend provisioning of VMs and their devices. The watch events do not contain values stored in xenstore, only key names. A guest administrator can observe non-sensitive domain and device lifecycle events relating to other guests. This information allows some insight into overall system configuration (including the number and general nature of other guests), and configuration of other guests (including the number and general nature of other guests' devices). This information might be commercially interesting or might make other attacks easier. There is not believed to be exposure of sensitive data. Specifically, there is no exposure of VNC passwords, port numbers, pathnames in host and guest filesystems, cryptographic keys, or within-guest data.
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 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xen是英国剑桥（Cambridge）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 through 4.14.x 版本存在安全漏洞，该漏洞源于在报告xenstore watch事件时，xenstore实现都不进行任何权限检查。来宾管理员可以监视根xenstored节点，这将导致每个创建、修改和删除密钥的通知。
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 | - |
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II. Public POCs for CVE-2020-29480
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2020-29480 (1)
Mailing List Discussions for CVE-2020-29480 (2)
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/ vendor-advisory x_refsource_FEDORA
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/ vendor-advisory x_refsource_FEDORA
Other References for CVE-2020-29480 (1)
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https://xenbits.xenproject.org/xsa/advisory-115.html x_refsource_MISC
Same Patch Batch · n/a · 2020-12-15 · 116 CVEs total
| CVE-2020-28442 | 7.5 HIGH | Prototype Pollution |
| CVE-2020-28456 | 7.3 HIGH | Cross-site Scripting (XSS) |
| CVE-2020-28457 | 7.2 HIGH | Cross-site Scripting (XSS) |
| CVE-2020-27055 | Google Android 安全漏洞 | |
| CVE-2020-29482 | Xen 代码问题漏洞 | |
| CVE-2020-29479 | Xen 权限许可和访问控制问题漏洞 | |
| CVE-2020-29571 | Xen 代码问题漏洞 | |
| CVE-2020-29570 | Xen 安全漏洞 | |
| CVE-2020-29569 | Linux kernel 资源管理错误漏洞 | |
| CVE-2020-27777 | Linux kernel 授权问题漏洞 | |
| CVE-2020-25712 | xorg-x11-server 缓冲区错误漏洞 | |
| CVE-2020-29568 | Xen 缓冲区错误漏洞 | |
| CVE-2020-29567 | Xen 安全漏洞 | |
| CVE-2020-29566 | Xen 处理逻辑错误漏洞 | |
| CVE-2020-27068 | Google Android 缓冲区错误漏洞 | |
| CVE-2020-27067 | Google Android 资源管理错误漏洞 | |
| CVE-2020-27066 | Google Android 资源管理错误漏洞 | |
| CVE-2020-27048 | Google Android 缓冲区错误漏洞 | |
| CVE-2020-27047 | Google Android 缓冲区错误漏洞 | |
| CVE-2020-27046 | Google Android 缓冲区错误漏洞 |
Showing top 20 of 116 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2020-29480
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