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CVE-2021-3448

Quick assessment

Affected
n/a dnsmasq
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.

dnsmasq是一款使用C语言编写的轻量级DNS转发和DHCP、TFTP服务器。 dnsmasq 存在安全漏洞，该漏洞源于随机源端口行为被禁用，使得缓存攻击成为可能。

AI Predicted 7.5 Difficulty: Moderate EPSS 2.29% · P83
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I. Basic Information for CVE-2021-3448

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in dnsmasq in versions before 2.85. When configured to use a specific server for a given network interface, dnsmasq uses a fixed port while forwarding queries. An attacker on the network, able to find the outgoing port used by dnsmasq, only needs to guess the random transmission ID to forge a reply and get it accepted by dnsmasq. This flaw makes a DNS Cache Poisoning attack much easier. The highest threat from this vulnerability is to data integrity.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当实现的标准安全检查
Source: CVE Program / CVE List V5
Vulnerability Title
dnsmasq 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
dnsmasq是一款使用C语言编写的轻量级DNS转发和DHCP、TFTP服务器。 dnsmasq 存在安全漏洞，该漏洞源于随机源端口行为被禁用，使得缓存攻击成为可能。
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
- dnsmasq dnsmasq 2.85 -

II. Public POCs for CVE-2021-3448

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III. Intelligence Information for CVE-2021-3448

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Vendor Advisories for CVE-2021-3448 (2)

Mailing List Discussions for CVE-2021-3448 (3)

Same Patch Batch · n/a · 2021-04-08 · 33 CVEs total

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CVE-2021-3146 Dolby DAX2 API Service 代码问题漏洞
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CVE-2021-22507 Micro Focus Operations Bridge Manager 授权问题漏洞
CVE-2021-22115 Cloud Foundry Cloud Controller 安全漏洞
CVE-2021-29154 Linux kernel 命令注入漏洞
CVE-2021-27945 Squirro Insights Engine 跨站脚本漏洞
CVE-2020-23539 Realtek rtl8723de 代码问题漏洞
CVE-2021-27522 Mr.Zhou Learnsite 授权问题漏洞

Showing top 20 of 33 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: dnsmasq
Same vendor: n/a
Same weakness: CWE-358

V. Comments for CVE-2021-3448

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