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        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
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          "number": "1",
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          "date": "2025-12-23T20:55:41Z",
          "number": "3",
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        "name": "Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)"
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          "text": "A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and \"telnet options\" during server negotiation. The lack of proper input scrubbing allows an attacker to send content or perform option negotiation without the application's intent. This vulnerability could be exploited if an application allows user input, thereby enabling attackers to execute arbitrary code on the system.",
          "title": "Vulnerability description"
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        },
        {
          "category": "other",
          "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.",
          "title": "Statement"
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2023-27533"
        },
        {
          "category": "external",
          "summary": "https://hackerone.com/reports/1891474",
          "url": "https://hackerone.com/reports/1891474"
        },
        {
          "category": "external",
          "summary": "https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html",
          "url": "https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/"
        },
        {
          "category": "external",
          "summary": "https://security.gentoo.org/glsa/202310-12",
          "url": "https://security.gentoo.org/glsa/202310-12"
        },
        {
          "category": "external",
          "summary": "https://security.netapp.com/advisory/ntap-20230420-0011/",
          "url": "https://security.netapp.com/advisory/ntap-20230420-0011/"
        }
      ],
      "release_date": "2023-03-30T20:15:00Z",
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CentOS-7:curl-0:7.29.0-59.el7_9.1.tuxcare.els1.x86_64",
            "CentOS-7:curl-0:7.29.0-59.el7_9.1.tuxcare.els2.x86_64",
            "CentOS-7:curl-0:7.29.0-59.el7_9.2.tuxcare.els1.x86_64",
            "CentOS-7:libcurl-0:7.29.0-59.el7_9.1.tuxcare.els1.i686",
            "CentOS-7:libcurl-0:7.29.0-59.el7_9.1.tuxcare.els1.x86_64",
            "CentOS-7:libcurl-0:7.29.0-59.el7_9.1.tuxcare.els2.i686",
            "CentOS-7:libcurl-0:7.29.0-59.el7_9.1.tuxcare.els2.x86_64",
            "CentOS-7:libcurl-0:7.29.0-59.el7_9.2.tuxcare.els1.i686",
            "CentOS-7:libcurl-0:7.29.0-59.el7_9.2.tuxcare.els1.x86_64",
            "CentOS-7:libcurl-devel-0:7.29.0-59.el7_9.1.tuxcare.els1.i686",
            "CentOS-7:libcurl-devel-0:7.29.0-59.el7_9.1.tuxcare.els1.x86_64",
            "CentOS-7:libcurl-devel-0:7.29.0-59.el7_9.1.tuxcare.els2.i686",
            "CentOS-7:libcurl-devel-0:7.29.0-59.el7_9.1.tuxcare.els2.x86_64",
            "CentOS-7:libcurl-devel-0:7.29.0-59.el7_9.2.tuxcare.els1.i686",
            "CentOS-7:libcurl-devel-0:7.29.0-59.el7_9.2.tuxcare.els1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        },
        {
          "category": "impact",
          "date": "2026-06-12T12:57:53.856904Z",
          "details": "CVE-2023-27533 is only exploitable when curl/libcurl is used with the TELNET protocol and an application forwards attacker-controlled username or telnet-option data into the TELNET negotiation; it does not affect HTTP(S), FTP, or other protocols. The Linux server/VM workloads in scope do not use telnet:// with curl/libcurl or expose TELNET option negotiation, so the vulnerable code path is never reached. Therefore, even with curl 7.29.0 present, this CVE is not applicable to this environment.",
          "product_ids": [
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            "CentOS-7:curl-0:7.29.0-59.el7_9.2.tuxcare.els1.x86_64",
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    }
  ]
}