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CVE-2020-29571

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 4.14.x 版本存在安全漏洞，该漏洞源于对于大多数FIFO事件通道的操作时间函数来说，边界检查通常依赖于CPU观察一致的状态。当生产者端使用适当有序的写操作时，消费者端不受重新有序读操作的保护，因此可能会取消对空指针的引用。恶意内核或漏洞百出的客户内核可以发起拒绝服务(DoS)攻击，从而影响整个系统。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.38% · P30
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I. Basic Information for CVE-2020-29571

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. A bounds check common to most operation time functions specific to FIFO event channels depends on the CPU observing consistent state. While the producer side uses appropriately ordered writes, the consumer side isn't protected against re-ordered reads, and may hence end up de-referencing a NULL pointer. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system. Only Arm systems may be vulnerable. Whether a system is vulnerable depends on the specific CPU. x86 systems are not vulnerable.
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 代码问题漏洞
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 4.14.x 版本存在安全漏洞，该漏洞源于对于大多数FIFO事件通道的操作时间函数来说，边界检查通常依赖于CPU观察一致的状态。当生产者端使用适当有序的写操作时，消费者端不受重新有序读操作的保护，因此可能会取消对空指针的引用。恶意内核或漏洞百出的客户内核可以发起拒绝服务(DoS)攻击，从而影响整个系统。
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-2020-29571

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III. Intelligence Information for CVE-2020-29571

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Vendor Advisories for CVE-2020-29571 (2)

Mailing List Discussions for CVE-2020-29571 (2)

Other References for CVE-2020-29571 (1)

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-2020-29480 Xen 授权问题漏洞
CVE-2020-29479 Xen 权限许可和访问控制问题漏洞
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

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Same vendor: n/a

V. Comments for CVE-2020-29571

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