Bug 5627 - [Anolis OS 8] Bugfix for CVE-2021-3448
Summary: [Anolis OS 8] Bugfix for CVE-2021-3448
Status: NEW
Alias: None
Product: Anolis OS 8
Classification: Anolis OS
Component: BaseOS Packages (show other bugs) BaseOS Packages
Version: 8.6
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: Jacob
QA Contact: shuming
URL:
Whiteboard:
Keywords: CVE
Depends on:
Blocks:
 
Reported: 2023-06-27 15:56 UTC by 小龙
Modified: 2023-06-27 15:56 UTC (History)
0 users

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Description 小龙 admin 2023-06-27 15:56:36 UTC 
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.

Broken commit info:

Bugfix commit info:
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=74d4fcd756a85bc1823232ea74334f7ccfb9d5d2