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CVE-2020-10761

Quick assessment

Affected
Red Hat 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）软件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 5.0.1之前版本中的Network Block Device (NBD) Server存在安全漏洞。远程攻击者可借助特制请求利用该漏洞导致qemu-nbd服务器崩溃（拒绝服务）。

CVSS 5.0 · Medium EPSS 1.80% · P78

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2020-10761

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
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）软件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 5.0.1之前版本中的Network Block Device (NBD) Server存在安全漏洞。远程攻击者可借助特制请求利用该漏洞导致qemu-nbd服务器崩溃（拒绝服务）。
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
Red Hat QEMU: all QEMU versions before QEMU 5.0.1 -

II. Public POCs for CVE-2020-10761

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III. Intelligence Information for CVE-2020-10761

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Vendor Advisories for CVE-2020-10761 (4)

Mailing List Discussions for CVE-2020-10761 (2)

IV. Related Vulnerabilities

Same product: QEMU:
Same vendor: Red Hat
Same weakness: CWE-617

V. Comments for CVE-2020-10761

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