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CVE-2021-39923

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，该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。

CVSS 7.5 · High EPSS 1.53% · P72

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-39923

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Large loop in the PNRP 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 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，该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。
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 >=3.2.0, <3.2.18 -

II. Public POCs for CVE-2021-39923

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-39923

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Vendor Advisories for CVE-2021-39923 (1)

Mailing List Discussions for CVE-2021-39923 (1)

Other References for CVE-2021-39923 (3)

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

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-2021-39924 7.5 HIGH Wireshark 安全漏洞
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-2021-39923

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