CVE-2019-18634 (GCVE-0-2019-18634)

Vulnerability from cvelistv5 – Published: 2020-01-29 17:23 – Updated: 2024-08-05 01:54
VLAI
Summary
In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2325 records in the last 180 days details
References
URL Tags
https://support.apple.com/kb/HT210919 x_refsource_CONFIRM
https://seclists.org/bugtraq/2020/Jan/44 mailing-listx_refsource_BUGTRAQ
https://www.sudo.ws/security.html x_refsource_MISC
https://www.sudo.ws/alerts/pwfeedback.html x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2020/01/30/6 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2020/01/31/1 mailing-listx_refsource_MLIST
http://seclists.org/fulldisclosure/2020/Jan/40 mailing-listx_refsource_FULLDISC
https://www.debian.org/security/2020/dsa-4614 vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2020… mailing-listx_refsource_MLIST
https://seclists.org/bugtraq/2020/Feb/3 mailing-listx_refsource_BUGTRAQ
https://seclists.org/bugtraq/2020/Feb/2 mailing-listx_refsource_BUGTRAQ
http://packetstormsecurity.com/files/156174/Slack… x_refsource_MISC
http://packetstormsecurity.com/files/156189/Sudo-… x_refsource_MISC
http://www.openwall.com/lists/oss-security/2020/02/05/2 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2020/02/05/5 mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4263-1/ vendor-advisoryx_refsource_UBUNTU
https://security.netapp.com/advisory/ntap-2020021… x_refsource_CONFIRM
https://usn.ubuntu.com/4263-2/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2020:0487 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2020:0509 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2020:0540 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2020:0726 vendor-advisoryx_refsource_REDHAT
https://security.gentoo.org/glsa/202003-12 vendor-advisoryx_refsource_GENTOO
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
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  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-18634",
    "datePublished": "2020-01-29T17:23:26.000Z",
    "dateReserved": "2019-10-30T00:00:00.000Z",
    "dateUpdated": "2024-08-05T01:54:14.581Z",
    "state": "PUBLISHED"
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      "date": "2026-10-20",
      "epss": "0.19276",
      "percentile": "0.97321"
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            "lang": "en",
            "value": "In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c."
          },
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            "value": "En Sudo anterior a la versi\u00f3n 1.8.26, si pwfeedback est\u00e1 habilitado en / etc / sudoers, los usuarios pueden desencadenar un desbordamiento de b\u00fafer basado en pila en el proceso de sudo privilegiado. (pwfeedback es una configuraci\u00f3n predeterminada en Linux Mint y sistema operativo elemental; sin embargo, NO es el valor predeterminado para paquetes ascendentes y muchos otros, y existir\u00eda solo si lo habilita un administrador). El atacante debe entregar una cadena larga al stdin de getln () en tgetpass.c."
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        "id": "CVE-2019-18634",
        "lastModified": "2024-11-21T04:33:25.447",
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                "version": "2.0"
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                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
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              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
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        },
        "published": "2020-01-29T18:15:12.247",
        "references": [
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            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html"
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        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
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                "lang": "en",
                "value": "CWE-787"
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      "aggregate_severity": "Important",
      "current_release_date": "2025-11-21T15:14:01+00:00",
      "cve": "CVE-2019-18634",
      "id": "CVE-2019-18634",
      "initial_release_date": "2019-01-01T00:00:00+00:00",
      "product_status:fixed": "308",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "sudo: Stack based buffer overflow when pwfeedback is enabled",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-18634.json",
      "version": "3"
    }
  }
}



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