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CVE-2021-3682

Quick assessment

Affected
n/a QEMU
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（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者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 存在安全漏洞，该漏洞源于在6.1.0-rc2之前版本的QEMU的USB重定向设备模拟中发现了一个缺陷，在从SPICE客户机进行批量传输期间，由于包队列已满而丢弃包时，就会发生这种情况。攻击者可利用该漏洞使QEMU call free()带有伪造的堆块元数据，从而导致QEMU崩溃或可能使用主机上QEMU进程的特权执行代码。

AI Predicted 8.8 Difficulty: Moderate EPSS 2.88% · P86
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I. Basic Information for CVE-2021-3682

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对无效指针或索引的释放
Source: CVE Program / CVE List V5
Vulnerability Title
QEMU 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者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 存在安全漏洞，该漏洞源于在6.1.0-rc2之前版本的QEMU的USB重定向设备模拟中发现了一个缺陷，在从SPICE客户机进行批量传输期间，由于包队列已满而丢弃包时，就会发生这种情况。攻击者可利用该漏洞使QEMU call free()带有伪造的堆块元数据，从而导致QEMU崩溃或可能使用主机上QEMU进程的特权执行代码。
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
- QEMU qemu 6.1.0-rc2 -

II. Public POCs for CVE-2021-3682

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III. Intelligence Information for CVE-2021-3682

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Vendor Advisories for CVE-2021-3682 (4)

Mailing List Discussions for CVE-2021-3682 (2)

Same Patch Batch · n/a · 2021-08-05 · 54 CVEs total

CVE-2021-22920 Citrix Application Delivery Controller安全漏洞
CVE-2021-3655 Linux kernel 输入验证错误漏洞
CVE-2021-35325 TotoLink A720R 缓冲区错误漏洞
CVE-2021-20592 Mitsubishi Electric GOT2000 安全漏洞
CVE-2021-22517 Micro Focus Data Protector 安全漏洞
CVE-2021-26586 HPE Edgeline Infrastructure Management 安全漏洞
CVE-2021-3642 Red Hat Wildfly Elytron 安全漏洞
CVE-2021-1630 MuleSoft Mule 代码问题漏洞
CVE-2021-3566 FFmpeg 信息泄露漏洞
CVE-2021-22924 libcurl 资源管理错误漏洞
CVE-2021-37156 Redmine 代码问题漏洞
CVE-2021-22919 Citrix ADC and NetScaler Gateway安全漏洞
CVE-2021-22927 Citrix Application Delivery Controller授权问题漏洞
CVE-2021-22928 Citrix Systems Citrix Virtual Apps and Desktops 安全漏洞
CVE-2021-21893 Foxit PDF Reader和Foxit PDF Editor 资源管理错误漏洞
CVE-2021-21831 Foxit PDF Reader和Foxit PDF Editor 资源管理错误漏洞
CVE-2021-21870 Foxit PDF Reader和Foxit PDF Editor 资源管理错误漏洞
CVE-2021-21785 IOBit Advanced SystemCare 安全漏洞
CVE-2021-21792 IOBit Advanced SystemCare 安全漏洞
CVE-2021-21791 IOBit Advanced SystemCare 安全漏洞

Showing top 20 of 54 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: QEMU
Same vendor: n/a
Same weakness: CWE-763

V. Comments for CVE-2021-3682

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