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CVE-2021-39920

Quick assessment

Affected
Wireshark Foundation Wireshark
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.

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 存在代码问题漏洞，该漏洞源于IPPUSB dissector中的验证不足，远程攻击者可以发送特制的数据包造成拒绝服务攻击。

CVSS 7.5 · High EPSS 3.16% · P87

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-39920

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
NULL pointer exception in the IPPUSB dissector in Wireshark 3.4.0 to 3.4.9 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 代码问题漏洞
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 存在代码问题漏洞，该漏洞源于IPPUSB dissector中的验证不足，远程攻击者可以发送特制的数据包造成拒绝服务攻击。
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-2021-39920

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-39920

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Vendor Advisories for CVE-2021-39920 (2)

Mailing List Discussions for CVE-2021-39920 (2)

Other References for CVE-2021-39920 (3)

IV. Related Vulnerabilities

Same product: Wireshark
Same vendor: Wireshark Foundation

V. Comments for CVE-2021-39920

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