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CVE-2019-19227 (GCVE-0-2019-19227)

Vulnerability from cvelistv5 – Published: 2019-11-22 13:39 – Updated: 2024-08-05 02:09
VLAI
Summary
In the AppleTalk subsystem in the Linux kernel before 5.1, there is a potential NULL pointer dereference because register_snap_client may return NULL. This will lead to denial of service in net/appletalk/aarp.c and net/appletalk/ddp.c, as demonstrated by unregister_snap_client, aka CID-9804501fa122.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Assigner
References
URL Tags
https://git.kernel.org/pub/scm/linux/kernel/git/t… x_refsource_MISC
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan… x_refsource_MISC
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://security.netapp.com/advisory/ntap-2020010… x_refsource_CONFIRM
https://seclists.org/bugtraq/2020/Jan/10 mailing-listx_refsource_BUGTRAQ
http://packetstormsecurity.com/files/155890/Slack… x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2020… mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4254-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4254-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4258-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4287-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4287-2/ vendor-advisoryx_refsource_UBUNTU
https://lists.debian.org/debian-lts-announce/2020… mailing-listx_refsource_MLIST
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Esto conllevar\u00e1 a una denegaci\u00f3n de servicio en los archivos net/appletalk/aarp.c y net/appletalk/ddp.c, como es demostrado por la funci\u00f3n unregister_snap_client, tambi\u00e9n se conoce como CID-9804501fa122.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":2.1,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":3.9,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.1\",\"matchCriteriaId\":\"B5857A73-CFC4-477B-8E21-2EDC12FABFDE\"}]}]}],\"references\":[{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1\",\"source\":\"cve@mitre.org\",\"tags\":[\"Release Notes\",\"Vendor Advisory\"]},{\"url\":\"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9804501fa1228048857910a6bf23e085aade37cc\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\",\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://seclists.org/bugtraq/2020/Jan/10\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20200103-0001/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://usn.ubuntu.com/4254-1/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://usn.ubuntu.com/4254-2/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://usn.ubuntu.com/4258-1/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://usn.ubuntu.com/4287-1/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://usn.ubuntu.com/4287-2/\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Release Notes\",\"Vendor Advisory\"]},{\"url\":\"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9804501fa1228048857910a6bf23e085aade37cc\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://seclists.org/bugtraq/2020/Jan/10\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20200103-0001/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/4254-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/4254-2/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/4258-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/4287-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/4287-2/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:27:40+00:00",
      "cve": "CVE-2019-19227",
      "id": "CVE-2019-19227",
      "initial_release_date": "2019-11-22T00:00:00+00:00",
      "product_status:known_not_affected": "93",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: potential NULL pointer dereference leads to DoS",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-19227.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-13T00:08:02Z",
      "cve": "CVE-2019-19227",
      "id": "CVE-2019-19227",
      "initial_release_date": "2023-02-15T04:06:21Z",
      "product_status:known_affected": "117",
      "product_status:known_not_affected": "61",
      "product_status:recommended": "634",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2019-19227",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2019-19227.json",
      "version": "26"
    }
  }
}



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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.


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.