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CVE-2017-1000405

Description

The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() in the touch_pmd() function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the pmd will become dirty. This scenario breaks the new can_follow_write_pmd()s logic - pmd can become dirty without going through a COW cycle. This bug is not as severe as the original Dirty cow because an ext4 file (or any other regular file) cannot be mapped using THP. Nevertheless, it does allow us to overwrite read-only huge pages. For example, the zero huge page and sealed shmem files can be overwritten (since their mapping can be populated using THP). Note that after the first write page-fault to the zero page, it will be replaced with a new fresh (and zeroed) thp.

Risk Information

Base Score
7.0
MODERATE
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
Exploitation Probability
4.492

Associated Vulnerability

VulnerabilityOS Platform
Linux kernel (USN-3507-1) linux-image-4.13.0-19-generic_4.13.0-19.22_i386.debLinux
Linux kernel (USN-3507-1) linux-image-4.13.0-19-generic_4.13.0-19.22_amd64.debLinux
Linux kernel (USN-3507-1) linux-image-4.13.0-19-lowlatency_4.13.0-19.22_i386.debLinux
Linux kernel (USN-3507-1) linux-image-4.13.0-19-lowlatency_4.13.0-19.22_amd64.debLinux
Linux kernel (USN-3508-1) linux-image-4.10.0-42-generic_4.10.0-42.46_i386.debLinux
Linux kernel (USN-3508-1) linux-image-4.10.0-42-generic_4.10.0-42.46_amd64.debLinux
Linux kernel (USN-3508-1) linux-image-4.10.0-42-lowlatency_4.10.0-42.46_i386.debLinux
Linux kernel (USN-3508-1) linux-image-4.10.0-42-lowlatency_4.10.0-42.46_amd64.debLinux
Linux hardware enablement (HWE) kernel (USN-3508-2) linux-image-4.10.0-42-generic_4.10.0-42.46~16.04.1_i386.debLinux
Linux hardware enablement (HWE) kernel (USN-3508-2) linux-image-4.10.0-42-generic_4.10.0-42.46~16.04.1_amd64.debLinux
Linux hardware enablement (HWE) kernel (USN-3508-2) linux-image-generic-hwe-16.04_4.10.0.42.44_i386.debLinux
Linux hardware enablement (HWE) kernel (USN-3508-2) linux-image-generic-hwe-16.04_4.10.0.42.44_amd64.debLinux
Linux hardware enablement (HWE) kernel (USN-3508-2) linux-image-4.10.0-42-lowlatency_4.10.0-42.46~16.04.1_i386.debLinux
Linux hardware enablement (HWE) kernel (USN-3508-2) linux-image-4.10.0-42-lowlatency_4.10.0-42.46~16.04.1_amd64.debLinux
Linux hardware enablement (HWE) kernel (USN-3508-2) linux-image-lowlatency-hwe-16.04_4.10.0.42.44_i386.debLinux
Linux hardware enablement (HWE) kernel (USN-3508-2) linux-image-lowlatency-hwe-16.04_4.10.0.42.44_amd64.debLinux
Linux kernel (USN-3509-1) linux-image-aws_4.4.0.1043.45_amd64.debLinux
Linux kernel (USN-3509-1) linux-image-kvm_4.4.0.1012.12_amd64.debLinux
Linux kernel (USN-3509-1) linux-image-generic_4.4.0.103.108_i386.debLinux
Linux kernel (USN-3509-1) linux-image-generic_4.4.0.103.108_amd64.debLinux
Linux kernel (USN-3509-1) linux-image-lowlatency_4.4.0.103.108_i386.debLinux
Linux kernel (USN-3509-1) linux-image-lowlatency_4.4.0.103.108_amd64.debLinux
Linux kernel (USN-3509-1) linux-image-4.4.0-1012-kvm_4.4.0-1012.17_amd64.debLinux
Linux kernel (USN-3509-1) linux-image-4.4.0-1043-aws_4.4.0-1043.52_amd64.debLinux
Linux kernel (USN-3509-1) linux-image-4.4.0-103-generic_4.4.0-103.126_i386.debLinux
Linux kernel (USN-3509-1) linux-image-4.4.0-103-generic_4.4.0-103.126_amd64.debLinux
Linux kernel (USN-3509-1) linux-image-4.4.0-103-lowlatency_4.4.0-103.126_i386.debLinux
Linux kernel (USN-3509-1) linux-image-4.4.0-103-lowlatency_4.4.0-103.126_amd64.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-aws_4.4.0.1005.5_amd64.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-4.4.0-1005-aws_4.4.0-1005.5_amd64.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-4.4.0-103-generic_4.4.0-103.126~14.04.1_i386.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-4.4.0-103-generic_4.4.0-103.126~14.04.1_amd64.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-generic-lts-xenial_4.4.0.103.86_i386.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-generic-lts-xenial_4.4.0.103.86_amd64.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-4.4.0-103-lowlatency_4.4.0-103.126~14.04.1_i386.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-4.4.0-103-lowlatency_4.4.0-103.126~14.04.1_amd64.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-lowlatency-lts-xenial_4.4.0.103.86_i386.debLinux
Linux kernel for Amazon Web Services (AWS) systems (USN-3509-2) linux-image-lowlatency-lts-xenial_4.4.0.103.86_amd64.debLinux
Linux kernel (USN-3510-1) linux-image-generic_3.13.0.137.146_i386.debLinux
Linux kernel (USN-3510-1) linux-image-generic_3.13.0.137.146_amd64.debLinux
Linux kernel (USN-3510-1) linux-image-lowlatency_3.13.0.137.146_i386.debLinux
Linux kernel (USN-3510-1) linux-image-lowlatency_3.13.0.137.146_amd64.debLinux
Linux kernel (USN-3510-1) linux-image-3.13.0-137-generic_3.13.0-137.186_i386.debLinux
Linux kernel (USN-3510-1) linux-image-3.13.0-137-generic_3.13.0-137.186_amd64.debLinux
Linux kernel (USN-3510-1) linux-image-3.13.0-137-lowlatency_3.13.0-137.186_i386.debLinux
Linux kernel (USN-3510-1) linux-image-3.13.0-137-lowlatency_3.13.0-137.186_amd64.debLinux
Linux kernel for Microsoft Azure Cloud systems (USN-3511-1) linux-image-azure_4.11.0.1016.16_amd64.debLinux
Linux kernel for Microsoft Azure Cloud systems (USN-3511-1) linux-image-4.11.0-1016-azure_4.11.0-1016.16_amd64.debLinux
Linux kernel (LSN-0033-1) linux-image-4.13.0-1002-gcp_4.13.0-1002.5_amd64.debLinux
Linux kernel for Google Cloud Platform (GCP) systems (USN-3507-2) linux-image-4.13.0-1002-gcp_4.13.0-1002.5_amd64.debLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234