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CVE-2021-3308

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 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x存在安全漏洞，该漏洞允许HVM客户机拒绝服务(DoS)攻击。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.41% · P34

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-3308

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host.
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 安全漏洞
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 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x存在安全漏洞，该漏洞允许HVM客户机拒绝服务(DoS)攻击。
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-2021-3308

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III. Intelligence Information for CVE-2021-3308

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Vendor Advisories for CVE-2021-3308 (1)

Mailing List Discussions for CVE-2021-3308 (1)

Other References for CVE-2021-3308 (1)

Same Patch Batch · n/a · 2021-01-26 · 42 CVEs total

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CVE-2020-13582 Micrium uC-HTTP 代码问题漏洞
CVE-2020-27274 Honeywell OPC UA Tunneller 代码问题漏洞
CVE-2020-27299 Honeywell OPC UA Tunneller 缓冲区错误漏洞
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CVE-2020-9492 Apache Hadoop 安全漏洞
CVE-2021-22159 Proofpoint Insider Threat Management Server 安全漏洞
CVE-2021-3309 Wekan 信任管理问题漏洞
CVE-2021-26271 CKEditor 安全漏洞
CVE-2021-26272 CKEditor 安全漏洞
CVE-2020-23774 苏州华兆科技 Winmail 跨站脚本漏洞
CVE-2020-23776 苏州华兆科技 Winmail 代码问题漏洞
CVE-2021-3317 KLog 命令注入漏洞
CVE-2021-3165 SmartAgent 安全漏洞

Showing top 20 of 42 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-3308

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