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CVE-2016-7421

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.

QEMU（又名Quick Emulator）是法国程序员法布里斯-贝拉（Fabrice Bellard）所研发的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 QEMU中的hw/scsi/vmw_pvscsi.c文件的‘pvscsi_ring_pop_req_descr’函数存在安全漏洞。本地访客端操作系统的攻击者可通过运行SCSI IO请求利用该漏洞造成拒绝服务（无限循环和QEMU进程崩溃）。

AI Predicted 6.5 Difficulty: Trivial EPSS 0.40% · P35

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2016-7421

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit process IO loop to the ring size.
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
QEMU 拒绝服务漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QEMU（又名Quick Emulator）是法国程序员法布里斯-贝拉（Fabrice Bellard）所研发的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 QEMU中的hw/scsi/vmw_pvscsi.c文件的‘pvscsi_ring_pop_req_descr’函数存在安全漏洞。本地访客端操作系统的攻击者可通过运行SCSI IO请求利用该漏洞造成拒绝服务（无限循环和QEMU进程崩溃）。
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-2016-7421

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III. Intelligence Information for CVE-2016-7421

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Vendor Advisories for CVE-2016-7421 (2)

Mailing List Discussions for CVE-2016-7421 (4)

Other References for CVE-2016-7421 (1)

Same Patch Batch · n/a · 2016-12-10 · 17 CVEs total

CVE-2016-4964 QEMU 拒绝服务漏洞
CVE-2016-6490 QEMU 拒绝服务漏洞
CVE-2016-6833 QEMU 释放后重用漏洞
CVE-2016-6834 QEMU 拒绝服务漏洞
CVE-2016-6835 QEMU 安全漏洞
CVE-2016-6836 QEMU 信息泄露漏洞
CVE-2016-6888 QEMU 整数溢出漏洞
CVE-2016-7116 QEMU 目录遍历漏洞
CVE-2016-7155 QEMU 拒绝服务漏洞
CVE-2016-7156 QEMU 拒绝服务漏洞
CVE-2016-7157 QEMU 拒绝服务漏洞
CVE-2016-7170 QEMU 拒绝服务漏洞
CVE-2016-7422 QEMU 资料不足漏洞
CVE-2016-7466 QEMU 资源管理错误漏洞
CVE-2016-7994 QEMU 资源管理错误漏洞
CVE-2016-7995 Qemu 拒绝服务漏洞

IV. Related Vulnerabilities

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

V. Comments for CVE-2016-7421

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