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CVE-2023-28321 Detail

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`.


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
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References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://seclists.org/fulldisclosure/2023/Jul/47 Mailing List  Third Party Advisory 
http://seclists.org/fulldisclosure/2023/Jul/48 Mailing List  Third Party Advisory 
http://seclists.org/fulldisclosure/2023/Jul/52 Mailing List  Third Party Advisory 
https://hackerone.com/reports/1950627 Exploit  Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2023/10/msg00016.html Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4I75RDGX5ULSSCBE5BF3P5I5SFO7ULQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2LIWHWKOVH24COGGBCVOWDXXIUPKOMK/
https://security.gentoo.org/glsa/202310-12 Third Party Advisory 
https://security.netapp.com/advisory/ntap-20230609-0009/ Third Party Advisory 
https://support.apple.com/kb/HT213843 Third Party Advisory 
https://support.apple.com/kb/HT213844 Third Party Advisory 
https://support.apple.com/kb/HT213845 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-295 Improper Certificate Validation cwe source acceptance level NIST   HackerOne  

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Change History

13 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-28321
NVD Published Date:
05/26/2023
NVD Last Modified:
11/06/2023
Source:
HackerOne