CVE-2023-28321 — Improper Certificate Validation in Curl
Severity
5.9MEDIUMNVD
EPSS
0.3%
top 46.94%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMay 26
Latest updateSep 11
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 converte…
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:NExploitability: 2.2 | Impact: 3.6
Affected Packages5 packages
Also affects: Debian Linux 10.0, Fedora 37, 38
Patches
🔴Vulnerability Details
6GHSA
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CVEList
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