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
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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            {
              "name": "USN-4263-2",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4263-2/"
            },
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              "name": "RHSA-2020:0487",
              "refsource": "REDHAT",
              "url": "https://access.redhat.com/errata/RHSA-2020:0487"
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            {
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              "url": "https://access.redhat.com/errata/RHSA-2020:0726"
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              "name": "GLSA-202003-12",
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              "url": "https://security.gentoo.org/glsa/202003-12"
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            {
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              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/"
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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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2019-18634",
      "date": "2026-06-03",
      "epss": "0.88008",
      "percentile": "0.99499"
    },
    "fkie_nvd": {
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      "id": "CVE-2019-18634",
      "lastModified": "2024-11-21T04:33:25.447",
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      "published": "2020-01-29T18:15:12.247",
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      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-787\"}]}]"
    },
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Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://seclists.org/bugtraq/2020/Feb/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://seclists.org/bugtraq/2020/Feb/3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://seclists.org/bugtraq/2020/Jan/44\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/202003-12\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20200210-0001/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://support.apple.com/kb/HT210919\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/4263-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/4263-2/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.debian.org/security/2020/dsa-4614\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.sudo.ws/alerts/pwfeedback.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"https://www.sudo.ws/security.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}"
  }
}


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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.