CVE-2022-42916 (GCVE-0-2022-42916)

Vulnerability from cvelistv5 – Published: 2022-10-29 00:00 – Updated: 2026-02-13 19:48
VLAI
Summary
In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • n/a
  • CWE-319 - Cleartext Transmission of Sensitive Information
Assigner
References
Show details on NVD website
To clipboard 

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    },
    "microsoft_vex": {
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      "cve": "CVE-2022-42916",
      "id": "msrc_CVE-2022-42916",
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      "product_status:fixed": "4",
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      "source": "Microsoft CSAF VEX",
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      "title": "In curl before 7.86.0 the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion e.g. using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.",
      "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2022-42916.json",
      "version": "3"
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La primera versi\u00f3n afectada es la 7.77.0 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:58:47+00:00",
      "cve": "CVE-2022-42916",
      "id": "CVE-2022-42916",
      "initial_release_date": "2022-10-26T00:00:00+00:00",
      "product_status:fixed": "12",
      "product_status:known_not_affected": "140",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "curl: HSTS bypass via IDN",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-42916.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-25T17:22:12Z",
      "cve": "CVE-2022-42916",
      "id": "CVE-2022-42916",
      "initial_release_date": "2023-02-15T03:22:59Z",
      "product_status:known_affected": "271",
      "product_status:known_not_affected": "151",
      "product_status:recommended": "253",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-42916",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-42916.json",
      "version": "54"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://curl.se/docs/CVE-2022-42916.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVU3IMZCKR4VE6KJ4GCWRL2ILLC6OV76/\", \"name\": \"FEDORA-2022-01ffde372c\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q27V5YYMXUVI6PRZQVECON32XPVWTKDK/\", \"name\": \"FEDORA-2022-39688a779d\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/37YEVVC6NAF6H7UHH6YAUY5QEVY6LIH2/\", \"name\": \"FEDORA-2022-e9d65906c4\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20221209-0010/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.gentoo.org/glsa/202212-01\", \"name\": \"GLSA-202212-01\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2022/12/21/1\", \"name\": \"[oss-security] 20221221 curl: CVE-2022-43551: Another HSTS bypass via IDN\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"https://support.apple.com/kb/HT213604\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://support.apple.com/kb/HT213605\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://seclists.org/fulldisclosure/2023/Jan/20\", \"name\": \"20230123 APPLE-SA-2023-01-23-5 macOS Monterey 12.6.3\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"http://seclists.org/fulldisclosure/2023/Jan/19\", \"name\": \"20230123 APPLE-SA-2023-01-23-4 macOS Ventura 13.2\", \"tags\": [\"mailing-list\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T13:19:05.420Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-42916\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-05-20T16:06:47.484727Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-319\", \"description\": \"CWE-319 Cleartext Transmission of Sensitive Information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-05-20T16:06:46.095Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"references\": [{\"url\": \"https://curl.se/docs/CVE-2022-42916.html\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVU3IMZCKR4VE6KJ4GCWRL2ILLC6OV76/\", \"name\": \"FEDORA-2022-01ffde372c\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q27V5YYMXUVI6PRZQVECON32XPVWTKDK/\", \"name\": \"FEDORA-2022-39688a779d\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/37YEVVC6NAF6H7UHH6YAUY5QEVY6LIH2/\", \"name\": \"FEDORA-2022-e9d65906c4\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20221209-0010/\"}, {\"url\": \"https://security.gentoo.org/glsa/202212-01\", \"name\": \"GLSA-202212-01\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2022/12/21/1\", \"name\": \"[oss-security] 20221221 curl: CVE-2022-43551: Another HSTS bypass via IDN\", \"tags\": [\"mailing-list\"]}, {\"url\": \"https://support.apple.com/kb/HT213604\"}, {\"url\": \"https://support.apple.com/kb/HT213605\"}, {\"url\": \"http://seclists.org/fulldisclosure/2023/Jan/20\", \"name\": \"20230123 APPLE-SA-2023-01-23-5 macOS Monterey 12.6.3\", \"tags\": [\"mailing-list\"]}, {\"url\": \"http://seclists.org/fulldisclosure/2023/Jan/19\", \"name\": \"20230123 APPLE-SA-2023-01-23-4 macOS Ventura 13.2\", \"tags\": [\"mailing-list\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2023-01-24T00:00:00.000Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-42916\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-02-13T19:48:21.552Z\", \"dateReserved\": \"2022-10-13T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2022-10-29T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.