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CVE-2021-21417— Use after free in fluidsynth

Quick assessment

Affected
FluidSynth fluidsynth
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.

fluidsynth是一个应用系统。用于通过使用SoundFont通过读取和处理MIDI输入设备中的MIDI事件来生成音频。 fluidsynth 存在资源管理错误漏洞，该漏洞源于发现自由冲突后的使用，在加载无效SoundFont文件时可能触发。

CVSS 7.2 · High EPSS 0.94% · P58

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-21417

Vulnerability Information
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Vulnerability Title
Use after free in fluidsynth
Source: CVE Program / CVE List V5
Vulnerability Description
fluidsynth is a software synthesizer based on the SoundFont 2 specifications. A use after free violation was discovered in fluidsynth, that can be triggered when loading an invalid SoundFont file.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
fluidsynth 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fluidsynth是一个应用系统。用于通过使用SoundFont通过读取和处理MIDI输入设备中的MIDI事件来生成音频。 fluidsynth 存在资源管理错误漏洞，该漏洞源于发现自由冲突后的使用，在加载无效SoundFont文件时可能触发。
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
FluidSynth fluidsynth < 2.1.8 -

II. Public POCs for CVE-2021-21417

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III. Intelligence Information for CVE-2021-21417

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Patches & Fixes for CVE-2021-21417 (1)

Vendor Advisories for CVE-2021-21417 (1)

Mailing List Discussions for CVE-2021-21417 (1)

Other References for CVE-2021-21417 (1)

IV. Related Vulnerabilities

Same product: fluidsynth
Same vendor: FluidSynth
Same weakness: CWE-416

V. Comments for CVE-2021-21417

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