CVE-2018-16884 (GCVE-0-2018-16884)

Vulnerability from cvelistv5 – Published: 2018-12-18 22:00 – Updated: 2024-08-05 10:32
VLAI?
Summary
A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.
Severity ?
6.5 (Medium)
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H
CWE
Assigner
References
URL Tags
http://www.securityfocus.com/bid/106253 vdb-entryx_refsource_BID
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://usn.ubuntu.com/3932-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3932-2/ vendor-advisoryx_refsource_UBUNTU
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://usn.ubuntu.com/3981-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3980-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3980-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3981-2/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:1873 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1891 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2696 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2730 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3309 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3517 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2020:0204 vendor-advisoryx_refsource_REDHAT
https://www.oracle.com/security-alerts/cpuApr2021.html x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
https://patchwork.kernel.org/patch/10733769/ x_refsource_CONFIRM
https://patchwork.kernel.org/cover/10733767/ x_refsource_CONFIRM
https://support.f5.com/csp/article/K21430012 x_refsource_CONFIRM
Impacted products
Vendor Product Version
[UNKNOWN] kernel: Affected: n/a
Create a notification for this product.
Date Public ?
2018-12-18 00:00
Show details on NVD website
To clipboard 

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      "sourceIdentifier": "secalert@redhat.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"secalert@redhat.com\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2018-16884\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2018-12-18T22:29:04.713\",\"lastModified\":\"2024-11-21T03:53:31.757\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A flaw was found in the Linux kernel\u0027s NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.\"},{\"lang\":\"es\",\"value\":\"Se ha encontrado un error en el subsistema de archivos NFS41+ del kernel de Linux. Las comparticiones de NFS41+ montadas en diferentes espacios de nombre al mismo tiempo pueden hacer que bc_svc_process() emplee el ID de canal trasero err\u00f3neo y provoque una vulnerabilidad de uso de memoria previamente liberada. As\u00ed, un usuario contenedor malicioso puede provocar la corrupci\u00f3n de la memoria host del kernel y un p\u00e1nico del sistema. Debido a la naturaleza del error, no se puede descartar totalmente un escalado de 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  }
}


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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.