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CVE-2021-39924

Quick assessment

Affected
Wireshark Foundation Wireshark
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wireshark（前称Ethereal）是Wireshark团队的一套网络数据包分析软件。该软件的功能是截取网络数据包，并显示出详细的数据以供分析。 Wireshark 存在安全漏洞，该漏洞源于Bluetooth DHT解析器中存在无限循环。攻击者可利用该漏洞通过应用程序发送精心编制的数据包，消耗所有可用的系统资源并执行拒绝服务（DoS）攻击。

CVSS 7.5 · High EPSS 4.93% · P92

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-39924

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Large loop in the Bluetooth DHT dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Wireshark 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wireshark（前称Ethereal）是Wireshark团队的一套网络数据包分析软件。该软件的功能是截取网络数据包，并显示出详细的数据以供分析。 Wireshark 存在安全漏洞，该漏洞源于Bluetooth DHT解析器中存在无限循环。攻击者可利用该漏洞通过应用程序发送精心编制的数据包，消耗所有可用的系统资源并执行拒绝服务（DoS）攻击。
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
Wireshark Foundation Wireshark >=3.4.0, <3.4.10 -

II. Public POCs for CVE-2021-39924

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-39924

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Vendor Advisories for CVE-2021-39924 (2)

Mailing List Discussions for CVE-2021-39924 (3)

Other References for CVE-2021-39924 (3)

Same Patch Batch · Wireshark Foundation · 2021-11-19 · 7 CVEs total

CVE-2021-39923 7.5 HIGH Wireshark 代码问题漏洞
CVE-2021-39921 7.5 HIGH Wireshark 代码问题漏洞
CVE-2021-39922 7.5 HIGH Wireshark 输入验证错误漏洞
CVE-2021-39925 7.5 HIGH Wireshark 输入验证错误漏洞
CVE-2021-39926 7.5 HIGH Wireshark 输入验证错误漏洞
CVE-2021-39929 7.5 HIGH Wireshark 输入验证错误漏洞

IV. Related Vulnerabilities

Same product: Wireshark
Same vendor: Wireshark Foundation

V. Comments for CVE-2021-39924

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