CVE-2019-13272 (GCVE-0-2019-13272)

Vulnerability from cvelistv5 – Published: 2019-07-17 12:32 – Updated: 2025-10-21 23:45
VLAI? CISA
Summary
In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit's pkexec helper with PTRACE_TRACEME. NOTE: SELinux deny_ptrace might be a usable workaround in some environments.
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
http://packetstormsecurity.com/files/153663/Linux… x_refsource_MISC
https://bugs.chromium.org/p/project-zero/issues/d… x_refsource_MISC
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan… x_refsource_MISC
https://github.com/torvalds/linux/commit/6994eefb… x_refsource_MISC
https://git.kernel.org/cgit/linux/kernel/git/torv… x_refsource_MISC
https://bugzilla.suse.com/show_bug.cgi?id=1140671 x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=1730895 x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://www.debian.org/security/2019/dsa-4484 vendor-advisoryx_refsource_DEBIAN
https://seclists.org/bugtraq/2019/Jul/30 mailing-listx_refsource_BUGTRAQ
https://seclists.org/bugtraq/2019/Jul/33 mailing-listx_refsource_BUGTRAQ
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
http://packetstormsecurity.com/files/153702/Slack… x_refsource_MISC
https://security.netapp.com/advisory/ntap-2019080… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:2405 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2411 vendor-advisoryx_refsource_REDHAT
https://usn.ubuntu.com/4093-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4094-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4095-1/ vendor-advisoryx_refsource_UBUNTU
http://packetstormsecurity.com/files/154245/Kerne… x_refsource_MISC
https://support.f5.com/csp/article/K91025336 x_refsource_CONFIRM
https://usn.ubuntu.com/4117-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4118-1/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:2809 vendor-advisoryx_refsource_REDHAT
https://support.f5.com/csp/article/K91025336?utm_… x_refsource_CONFIRM
http://packetstormsecurity.com/files/154957/Linux… x_refsource_MISC
http://packetstormsecurity.com/files/156929/Linux… x_refsource_MISC
http://packetstormsecurity.com/files/165051/Linux… x_refsource_MISC
CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog

Date added: 2021-12-10

Due date: 2022-06-10

Required action: Apply updates per vendor instructions.

Used in ransomware: Unknown

Notes: https://nvd.nist.gov/vuln/detail/CVE-2019-13272

Show details on NVD website
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    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-13272",
    "datePublished": "2019-07-17T12:32:55.000Z",
    "dateReserved": "2019-07-04T00:00:00.000Z",
    "dateUpdated": "2025-10-21T23:45:33.569Z",
    "state": "PUBLISHED"
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      "dateAdded": "2021-12-10",
      "dueDate": "2022-06-10",
      "knownRansomwareCampaignUse": "Unknown",
      "notes": "https://nvd.nist.gov/vuln/detail/CVE-2019-13272",
      "product": "Kernel",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "Kernel/ptrace.c in Linux kernel mishandles contains an improper privilege management vulnerability that allows local users to obtain root access.",
      "vendorProject": "Linux",
      "vulnerabilityName": "Linux Kernel Improper Privilege Management Vulnerability"
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      "cisaExploitAdd": "2021-12-10",
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit\u0027s pkexec helper with PTRACE_TRACEME. NOTE: SELinux deny_ptrace might be a usable workaround in some environments.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux anterior a versi\\u00f3n 5.1.17, ptrace_link en el archivo kernel/ptrace.c maneja inapropiadamente la grabaci\\u00f3n de las credenciales de un proceso que desea crear una relaci\\u00f3n de ptrace, que permite a los usuarios locales obtener acceso de root aprovechando determinados escenarios con un relaci\\u00f3n de proceso padre-hijo, donde un padre elimina los privilegios y llama a execve (permitiendo potencialmente el control por parte de un atacante). Un factor que contribuye es un problema de vida \\u00fatil del objeto (que tambi\\u00e9n puede causar un p\\u00e1nico). Otro factor que contribuye es el marcado incorrecto de una relaci\\u00f3n de ptrace como privilegiada, que puede ser explotada mediante (por ejemplo) el ayudante pkexec de Polkit con PTRACE_TRACEME. NOTA: deny_ptrace de SELinux puede ser una soluci\\u00f3n \\u00fatil en algunos entornos.\"}]",
      "id": "CVE-2019-13272",
      "lastModified": "2024-11-21T04:24:35.753",
      "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:H/I:H/A:H\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 5.9}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:L/AC:L/Au:N/C:C/I:C/A:C\", \"baseScore\": 7.2, \"accessVector\": \"LOCAL\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"COMPLETE\", \"integrityImpact\": \"COMPLETE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"HIGH\", \"exploitabilityScore\": 3.9, \"impactScore\": 10.0, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2019-07-17T13:15:10.687",
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      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2019-13272\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2019-07-17T13:15:10.687\",\"lastModified\":\"2025-11-06T16:51:07.910\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit\u0027s pkexec helper with PTRACE_TRACEME. NOTE: SELinux deny_ptrace might be a usable workaround in some environments.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux anterior a versi\u00f3n 5.1.17, ptrace_link en el archivo kernel/ptrace.c maneja inapropiadamente la grabaci\u00f3n de las credenciales de un proceso que desea crear una relaci\u00f3n de ptrace, que permite a los usuarios locales obtener acceso de root aprovechando determinados escenarios con un relaci\u00f3n de proceso padre-hijo, donde un padre elimina los privilegios y llama a execve (permitiendo potencialmente el control por parte de un atacante). Un factor que contribuye es un problema de vida \u00fatil del objeto (que tambi\u00e9n puede causar un p\u00e1nico). Otro factor que contribuye es el marcado incorrecto de una relaci\u00f3n de ptrace como privilegiada, que puede ser explotada mediante (por ejemplo) el ayudante pkexec de Polkit con PTRACE_TRACEME. NOTA: deny_ptrace de SELinux puede ser una soluci\u00f3n \u00fatil en algunos 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      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

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.