Bug 6111 - [Anolis OS 8] Bugfix for CVE-2023-28321
Summary: [Anolis OS 8] Bugfix for CVE-2023-28321
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: 2023-08-07 12:06 UTC by 小龙
Modified: 2023-08-07 12:06 UTC (History)
0 users

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Description 小龙 admin 2023-08-07 12:06:10 UTC 
Description:
An improper certificate validation vulnerability exists in curl <v8.1.0 in the way it supports matching of wildcard patterns when listed as "Subject Alternative Name" in TLS server certificates. curl can be built to use its own name matching function for TLS rather than one provided by a TLS library. This private wildcard matching function would match IDN (International Domain Name) hosts incorrectly and could as a result accept patterns that otherwise should mismatch. IDN hostnames are converted to puny code before used for certificate checks. Puny coded names always start with `xn--` and should not be allowed to pattern match, but the wildcard check in curl could still check for `x*`, which would match even though the IDN name most likely contained nothing even resembling an `x`.

Broken commit info:

Bugfix commit info:
https://github.com/curl/curl/commit/199f2d440d8659b42