Vulnerability-Lookup

FKIE_CVE-2019-17455

Vulnerability from fkie_nvd - Published: 2019-10-10 18:15 - Updated: 2026-06-17 02:23

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.

References

URL	Tags
cve@mitre.org	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html	Mailing List, Third Party Advisory
cve@mitre.org	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html	Mailing List, Third Party Advisory
cve@mitre.org	https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145	Exploit, Issue Tracking, Mailing List, Third Party Advisory
cve@mitre.org	https://gitlab.com/jas/libntlm/issues/2	Exploit, Third Party Advisory
cve@mitre.org	https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html	Mailing List, Third Party Advisory
cve@mitre.org	https://lists.debian.org/debian-lts-announce/2021/11/msg00026.html	Mailing List, Third Party Advisory
cve@mitre.org	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/
cve@mitre.org	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/
cve@mitre.org	https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html	Third Party Advisory
cve@mitre.org	https://security-tracker.debian.org/tracker/CVE-2019-17455	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145	Exploit, Issue Tracking, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://gitlab.com/jas/libntlm/issues/2	Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2021/11/msg00026.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/
af854a3a-2127-422b-91ae-364da2661108	https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security-tracker.debian.org/tracker/CVE-2019-17455	Third Party Advisory

Impacted products

Vendor	Product	Version
nongnu	libntlm	*
debian	debian_linux	8.0
debian	debian_linux	9.0
canonical	ubuntu_linux	14.04
canonical	ubuntu_linux	16.04
canonical	ubuntu_linux	18.04
canonical	ubuntu_linux	20.04
fedoraproject	fedora	32
fedoraproject	fedora	33
opensuse	backports_sle	15.0
opensuse	leap	15.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nongnu:libntlm:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8CDC3431-0B08-4AEE-8B82-19648D120D6F",
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              "vulnerable": true
            },
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            }
          ],
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      ]
    },
    {
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              "matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D",
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              "matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
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            }
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    },
    {
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "B620311B-34A3-48A6-82DF-6F078D7A4493",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request."
    },
    {
      "lang": "es",
      "value": "Libntlm versiones hasta 1.5, se basa en un tama\u00f1o de b\u00fafer fijo para operaciones de lectura y escritura de las funciones tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge y tSmbNtlmAuthResponse, como es demostrado por una lectura excesiva de b\u00fafer en la regi\u00f3n heap de la memoria en la funci\u00f3n buildSmbNtlmAuthRequest en el archivo smbutil.c para una petici\u00f3n NTLM especialmente dise\u00f1ada."
    }
  ],
  "id": "CVE-2019-17455",
  "lastModified": "2026-06-17T02:23:59.040",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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          "attackVector": "NETWORK",
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          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2019-10-10T18:15:11.647",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
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      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html"
    },
    {
      "source": "cve@mitre.org",
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    },
    {
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        "Issue Tracking",
        "Mailing List",
        "Third Party Advisory"
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    },
    {
      "source": "cve@mitre.org",
      "tags": [
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        "Third Party Advisory"
      ],
      "url": "https://gitlab.com/jas/libntlm/issues/2"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
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      ],
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    },
    {
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    },
    {
      "source": "cve@mitre.org",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/"
    },
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    },
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    },
    {
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        "Third Party Advisory"
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      "url": "https://security-tracker.debian.org/tracker/CVE-2019-17455"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
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    },
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      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/"
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    },
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  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2019-17455 (GCVE-0-2019-17455)

Vulnerability from cvelistv5 – Published: 2019-10-10 17:17 – Updated: 2024-08-05 01:40

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

10 references

URL	Tags
https://gitlab.com/jas/libntlm/issues/2	x_refsource_MISC
https://people.canonical.com/~ubuntu-security/cve…	x_refsource_CONFIRM
https://security-tracker.debian.org/tracker/CVE-2…	x_refsource_CONFIRM
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug…	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T01:40:15.921Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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          },
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

FKIE_CVE-2019-17455

CVE-2019-17455 (GCVE-0-2019-17455)

Tags

Sightings

Nomenclature

Related by attack behaviour