FKIE_CVE-2023-28321

Vulnerability from fkie_nvd - Published: 2023-05-26 21:15 - Updated: 2025-01-15 16:15
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
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
support@hackerone.comhttp://seclists.org/fulldisclosure/2023/Jul/47Mailing List, Third Party Advisory
support@hackerone.comhttp://seclists.org/fulldisclosure/2023/Jul/48Mailing List, Third Party Advisory
support@hackerone.comhttp://seclists.org/fulldisclosure/2023/Jul/52Mailing List, Third Party Advisory
support@hackerone.comhttps://hackerone.com/reports/1950627Exploit, Patch, Third Party Advisory
support@hackerone.comhttps://lists.debian.org/debian-lts-announce/2023/10/msg00016.htmlMailing List, Third Party Advisory
support@hackerone.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4I75RDGX5ULSSCBE5BF3P5I5SFO7ULQ/
support@hackerone.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2LIWHWKOVH24COGGBCVOWDXXIUPKOMK/
support@hackerone.comhttps://security.gentoo.org/glsa/202310-12Third Party Advisory
support@hackerone.comhttps://security.netapp.com/advisory/ntap-20230609-0009/Third Party Advisory
support@hackerone.comhttps://support.apple.com/kb/HT213843Third Party Advisory
support@hackerone.comhttps://support.apple.com/kb/HT213844Third Party Advisory
support@hackerone.comhttps://support.apple.com/kb/HT213845Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Jul/47Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Jul/48Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Jul/52Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/1950627Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/10/msg00016.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4I75RDGX5ULSSCBE5BF3P5I5SFO7ULQ/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2LIWHWKOVH24COGGBCVOWDXXIUPKOMK/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202310-12Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230609-0009/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213843Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213844Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213845Third Party Advisory
Impacted products
Vendor Product Version
haxx curl *
debian debian_linux 10.0
fedoraproject fedora 37
fedoraproject fedora 38
netapp clustered_data_ontap -
netapp ontap_antivirus_connector -
netapp h300s_firmware -
netapp h300s -
netapp h500s_firmware -
netapp h500s -
netapp h700s_firmware -
netapp h700s -
netapp h410s_firmware -
netapp h410s -
apple macos *
apple macos *
apple macos *
To clipboard 

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      "value": "An improper certificate validation vulnerability exists in curl \u003cv8.1.0 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`."
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  "id": "CVE-2023-28321",
  "lastModified": "2025-01-15T16:15:26.203",
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          "confidentialityImpact": "NONE",
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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.