CVE-2021-27379
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 中存在安全漏洞。该漏洞源于允许x86 Intel HVM来宾操作系统用户实现非预期的读/写DMA访问，并可能导致拒绝服务（主机操作系统崩溃）或获得权限。以下产品及版本受到影响：Xen 4.11.x 版本。
Possible ATT&CK Techniques 1 AI
T1055 · Process Injection
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I. Basic Information for CVE-2021-27379
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 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565.
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 中存在安全漏洞。该漏洞源于允许x86 Intel HVM来宾操作系统用户实现非预期的读/写DMA访问，并可能导致拒绝服务（主机操作系统崩溃）或获得权限。以下产品及版本受到影响：Xen 4.11.x 版本。
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-2021-27379
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-27379 (1)
Mailing List Discussions for CVE-2021-27379 (1)
Other References for CVE-2021-27379 (2)
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https://xenbits.xen.org/xsa/advisory-366.html x_refsource_MISC
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http://xenbits.xen.org/xsa/advisory-366.html x_refsource_CONFIRM
Same Patch Batch · n/a · 2021-02-18 · 27 CVEs total
| CVE-2020-28490 | 9.1 CRITICAL | Command Injection |
| CVE-2020-28496 | 7.5 HIGH | Regular Expression Denial of Service (ReDoS) |
| CVE-2021-23341 | 7.5 HIGH | Regular Expression Denial of Service (ReDoS) |
| CVE-2020-28491 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2020-28499 | 7.3 HIGH | Prototype Pollution |
| CVE-2021-23340 | 7.1 HIGH | Local File Inclusion |
| CVE-2020-28463 | 6.5 MEDIUM | Server-side Request Forgery (SSRF) |
| CVE-2021-27375 | Containous Traefik 安全漏洞 | |
| CVE-2020-19513 | FinalWire AIDA64 Engineer 缓冲区错误漏洞 | |
| CVE-2021-27124 | Doctor Appointment System SQL注入漏洞 | |
| CVE-2021-27378 | Rust rand_core 安全特征问题漏洞 | |
| CVE-2021-27377 | Rust yottadb 资源管理错误漏洞 | |
| CVE-2021-27376 | Rust nb-connect 缓冲区错误漏洞 | |
| CVE-2020-29664 | DJI Mavic 2 命令注入漏洞 | |
| CVE-2020-35577 | Endalia Selection Porta 安全漏洞 | |
| CVE-2019-18255 | GE Digital HMI/SCADA iFIX 权限许可和访问控制问题漏洞 | |
| CVE-2019-18243 | GE Digital HMI/SCADA iFIX 权限许可和访问控制问题漏洞 | |
| CVE-2021-27329 | Friendica 代码问题漏洞 | |
| CVE-2021-27335 | KollectApps 代码问题漏洞 | |
| CVE-2020-35591 | Pi-hole 授权问题漏洞 |
Showing top 20 of 27 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2021-27379
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