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      "text": "Low"
    },
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    "csaf_version": "2.0",
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      "text": "TuxCare License Agreement",
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        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "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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          "date": "2021-06-11T16:15:00Z",
          "number": "1",
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          "number": "2",
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    "title": "Security update on CVE-2021-22898"
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  "vulnerabilities": [
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      "cve": "CVE-2021-22898",
      "cwe": {
        "id": "CWE-200",
        "name": "Exposure of Sensitive Information to an Unauthorized Actor"
      },
      "notes": [
        {
          "category": "description",
          "text": "curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.",
          "title": "Vulnerability description"
        },
        {
          "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"
        }
      ],
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          "Red-Hat-7:libcurl-devel-0:7.29.0-59.0.3.el7_9.2.x86_64"
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          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2021-22898"
        },
        {
          "category": "external",
          "summary": "http://www.openwall.com/lists/oss-security/2021/07/21/4",
          "url": "http://www.openwall.com/lists/oss-security/2021/07/21/4"
        },
        {
          "category": "external",
          "summary": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
        },
        {
          "category": "external",
          "summary": "https://curl.se/docs/CVE-2021-22898.html",
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          "summary": "https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde",
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        },
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          "summary": "https://hackerone.com/reports/1176461",
          "url": "https://hackerone.com/reports/1176461"
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          "summary": "https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3E",
          "url": "https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3E"
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          "summary": "https://www.oracle.com/security-alerts/cpuapr2022.html",
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      ],
      "release_date": "2021-06-11T16:15:00Z",
      "remediations": [
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          "category": "no_fix_planned",
          "date": "2026-06-12T13:07:13.613213Z",
          "details": "This vulnerability only triggers when curl or libcurl explicitly use the legacy TELNET protocol’s -t/CURLOPT_TELNETOPTIONS to send NEW_ENV variables, leaving common HTTP/HTTPS and other typical transfer usages unaffected. Even then, it merely discloses small, uninitialized stack bytes from the client to the TELNET server over an already clear‑text channel, with no integrity or availability impact and no required privileges. Given the high attack complexity, required user/application invocation, and the very narrow TELNET-specific preconditions, it is reasonable to deprioritize in centrally managed Linux VM/server deployments.",
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          "cvss_v2": {
            "accessComplexity": "HIGH",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 2.6,
            "baseSeverity": "LOW",
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.1,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "Red-Hat-7:curl-0:7.29.0-59.0.3.el7_9.2.tuxcare.els2.x86_64",
            "Red-Hat-7:curl-0:7.29.0-59.0.3.el7_9.2.x86_64",
            "Red-Hat-7:libcurl-0:7.29.0-59.0.3.el7_9.2.i686",
            "Red-Hat-7:libcurl-0:7.29.0-59.0.3.el7_9.2.tuxcare.els2.i686",
            "Red-Hat-7:libcurl-0:7.29.0-59.0.3.el7_9.2.tuxcare.els2.x86_64",
            "Red-Hat-7:libcurl-0:7.29.0-59.0.3.el7_9.2.x86_64",
            "Red-Hat-7:libcurl-devel-0:7.29.0-59.0.3.el7_9.2.i686",
            "Red-Hat-7:libcurl-devel-0:7.29.0-59.0.3.el7_9.2.tuxcare.els2.i686",
            "Red-Hat-7:libcurl-devel-0:7.29.0-59.0.3.el7_9.2.tuxcare.els2.x86_64",
            "Red-Hat-7:libcurl-devel-0:7.29.0-59.0.3.el7_9.2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ]
    }
  ]
}