Improper Certificate Validation Affecting libcurl-devel package, versions <0:8.2.1-1.amzn2.0.2
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Test your applications- Snyk ID SNYK-AMZN2-LIBCURLDEVEL-5881977
- published 6 Sep 2023
- disclosed 26 May 2023
Introduced: 26 May 2023
CVE-2023-28321 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 libcurl-devel to version 0:8.2.1-1.amzn2.0.2 or higher.
This issue was patched in ALAS2-2023-2230.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libcurl-devel package and not the libcurl-devel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
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.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-28321
- https://hackerone.com/reports/1950627
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F4I75RDGX5ULSSCBE5BF3P5I5SFO7ULQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z2LIWHWKOVH24COGGBCVOWDXXIUPKOMK/
- https://security.netapp.com/advisory/ntap-20230609-0009/
- https://support.apple.com/kb/HT213843
- https://support.apple.com/kb/HT213844
- https://support.apple.com/kb/HT213845
- http://seclists.org/fulldisclosure/2023/Jul/47
- http://seclists.org/fulldisclosure/2023/Jul/48
- http://seclists.org/fulldisclosure/2023/Jul/52
- https://security.gentoo.org/glsa/202310-12
- https://lists.debian.org/debian-lts-announce/2023/10/msg00016.html
- 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/