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FKIE_CVE-2023-6779

Vulnerability from fkie_nvd - Published: 2024-01-31 14:15 - Updated: 2026-06-17 06:51
Severity
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer.
References
secalert@redhat.comhttp://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
secalert@redhat.comhttp://seclists.org/fulldisclosure/2024/Feb/3Exploit, Mailing List, Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2023-6779Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2254395Issue Tracking
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/Mailing List
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/Mailing List
secalert@redhat.comhttps://security.gentoo.org/glsa/202402-01Third Party Advisory
secalert@redhat.comhttps://security.netapp.com/advisory/ntap-20240223-0006/Third Party Advisory
secalert@redhat.comhttps://www.openwall.com/lists/oss-security/2024/01/30/6Exploit, Mailing List
secalert@redhat.comhttps://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2024/Feb/3Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2023-6779Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2254395Issue Tracking
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202402-01Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20240223-0006/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2024/01/30/6Exploit, Mailing List
af854a3a-2127-422b-91ae-364da2661108https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtThird Party Advisory
0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
Impacted products
Vendor Product Version
gnu glibc *
fedoraproject fedora 38
fedoraproject fedora 39
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "glibc",
          "vendor": "n/a",
          "versions": [
            {
              "status": "unaffected",
              "version": "2.39"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "unaffected",
          "packageName": "compat-glibc",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "unaffected",
          "packageName": "glibc",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
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          ],
          "defaultStatus": "unaffected",
          "packageName": "compat-glibc",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
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          "cpes": [
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          "defaultStatus": "unaffected",
          "packageName": "glibc",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
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          "cpes": [
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          "defaultStatus": "unaffected",
          "packageName": "glibc",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
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          "cpes": [
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          "defaultStatus": "unaffected",
          "packageName": "glibc",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
        {
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          "defaultStatus": "affected",
          "packageName": "glibc",
          "product": "Fedora",
          "vendor": "Fedora"
        }
      ],
      "source": "secalert@redhat.com"
    },
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          "vendor": "Siemens",
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          ]
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        {
          "defaultStatus": "unknown",
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              "status": "affected",
              "version": "V3.1.5",
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            }
          ]
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      ],
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8A5153FA-49E9-457F-94BB-202CACA41C76",
              "versionEndExcluding": "2.39",
              "versionStartIncluding": "2.37",
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un desbordamiento de b\u00fafer en la regi\u00f3n Heap de la memoria de off-by-one en la funci\u00f3n __vsyslog_internal de la librer\u00eda glibc. Esta funci\u00f3n es llamada por las funciones syslog y vsyslog. Este problema ocurre cuando estas funciones se llaman con un mensaje mayor que INT_MAX bytes, lo que genera un c\u00e1lculo incorrecto del tama\u00f1o del b\u00fafer para almacenar el mensaje, lo que provoca un bloqueo de la aplicaci\u00f3n. Este problema afecta a glibc 2.37 y posteriores."
    }
  ],
  "id": "CVE-2023-6779",
  "lastModified": "2026-06-17T06:51:24.530",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
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          "confidentialityImpact": "NONE",
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          "privilegesRequired": "NONE",
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          "role": "CISA Coordinator",
          "timestamp": "2025-06-13T16:08:30.700931Z",
          "version": "2.0.3"
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  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
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          "value": "CWE-122"
        }
      ],
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    {
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          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
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    }
  ]
}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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