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Ubuntu: (Multiple Advisories) (CVE-2018-13405): Linux kernel (Azure, GCP, OEM) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2018-13405): Linux kernel (Azure, GCP, OEM) vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
07/06/2018
Created
03/19/2019
Added
08/31/2018
Modified
08/25/2021

Description

The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID.

Solution(s)

  • ubuntu-upgrade-linux-image-3-13-0-157-generic
  • ubuntu-upgrade-linux-image-3-13-0-157-generic-lpae
  • ubuntu-upgrade-linux-image-3-13-0-157-lowlatency
  • ubuntu-upgrade-linux-image-3-13-0-157-powerpc-e500
  • ubuntu-upgrade-linux-image-3-13-0-157-powerpc-e500mc
  • ubuntu-upgrade-linux-image-3-13-0-157-powerpc-smp
  • ubuntu-upgrade-linux-image-3-13-0-157-powerpc64-emb
  • ubuntu-upgrade-linux-image-3-13-0-157-powerpc64-smp
  • ubuntu-upgrade-linux-image-4-15-0-1017-oem
  • ubuntu-upgrade-linux-image-4-15-0-1018-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1020-aws
  • ubuntu-upgrade-linux-image-4-15-0-1020-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1021-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1022-azure
  • ubuntu-upgrade-linux-image-4-15-0-33-generic
  • ubuntu-upgrade-linux-image-4-15-0-33-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-33-lowlatency
  • ubuntu-upgrade-linux-image-4-15-0-33-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-1028-aws
  • ubuntu-upgrade-linux-image-4-4-0-1032-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1066-aws
  • ubuntu-upgrade-linux-image-4-4-0-1095-raspi2
  • ubuntu-upgrade-linux-image-4-4-0-1099-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-134-generic
  • ubuntu-upgrade-linux-image-4-4-0-134-generic-lpae
  • ubuntu-upgrade-linux-image-4-4-0-134-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-134-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-4-0-134-powerpc-smp
  • ubuntu-upgrade-linux-image-4-4-0-134-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-4-0-134-powerpc64-smp
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-edge
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae-lts-xenial
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-powerpc-e500
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-e500mc-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc-smp-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-emb-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • ubuntu-upgrade-linux-image-powerpc64-smp-lts-xenial
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon

References

  • USN-3676-1
  • USN-3676-2
  • USN-3696-1
  • USN-3696-2
  • USN-3752-1
  • USN-3752-2
  • USN-3752-3
  • USN-3753-1
  • USN-3753-2
  • USN-3754-1
  • USN-3910-1
  • USN-3910-2
  • USN-4486-1
  • DSA-4266
  • CVE-2018-13405
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