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dnsmasq における脆弱性
Title dnsmasq における脆弱性
Summary

dnsmasq には、不特定の脆弱性が存在します。

Possible impacts 情報を改ざんされる可能性があります。
Solution

ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。

Publication Date March 16, 2021, midnight
Registration Date Dec. 15, 2021, 5:52 p.m.
Last Update Dec. 15, 2021, 5:52 p.m.
CVSS3.0 : 警告
Score 4
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS2.0 : 警告
Score 4.3
Vector AV:N/AC:M/Au:N/C:N/I:P/A:N
Affected System
レッドハット
Red Hat Enterprise Linux 
Fedora Project
Fedora 
thekelleys
Dnsmasq 2.85 未満
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
その他
Change Log
No Changed Details Date of change
1 [2021年12月15日]
  掲載		 Dec. 15, 2021, 5:52 p.m.
NVD Vulnerability Information
CVE-2021-3448
Summary

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.

Publication Date April 9, 2021, 8:15 a.m.
Registration Date April 9, 2021, 10:04 a.m.
Last Update Nov. 21, 2024, 3:21 p.m.
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:* 2.85
Configuration2 or higher or less more than less than
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
Configuration3 or higher or less more than less than
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Configuration4 or higher or less more than less than
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.9.0:*:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List