CVE-2017-1000405
HIGH
7,0
Source: [email protected]
Attack Vector: local
Attack Complexity: high
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
MEDIUM
6,9
Source: [email protected]
Access Vector: local
Access Complexity: medium
Authentication: none
Confidentiality: complete
Integrity: complete
Availability: complete
Description
AI Translation Available
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.
EPSS (Exploit Prediction Scoring System)
Trend Analysis
EPSS (Exploit Prediction Scoring System)
Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.
EPSS Score
0,0449
Percentile
0,9th
Updated
EPSS Score Trend (Last 90 Days)
362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
DraftCommon Consequences
Security Scopes Affected:
Availability
Confidentiality
Integrity
Access Control
Potential Impacts:
Dos: Resource Consumption (Cpu)
Dos: Resource Consumption (Memory)
Dos: Resource Consumption (Other)
Dos: Crash, Exit, Or Restart
Dos: Instability
Read Files Or Directories
Read Application Data
Execute Unauthorized Code Or Commands
Gain Privileges Or Assume Identity
Bypass Protection Mechanism
Applicable Platforms
Languages:
C, C++, Java
Technologies:
Mobile, ICS/OT
Exploit
Linux Kernel - 'The Huge Dirty Cow' Overwriting …
Linux Kernel - 'The Huge Dirty Cow' Overwriting The Huge Zero Page (1)
View Exploit Code →
Exploit
Linux Kernel - 'The Huge Dirty Cow' Overwriting …
Linux Kernel - 'The Huge Dirty Cow' Overwriting The Huge Zero Page (2)
View Exploit Code →
Operating System
Linux Kernel by Linux
Version Range Affected
From
4.9.7
(inclusive)
To
4.9.67
(exclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System
Linux Kernel by Linux
Version Range Affected
From
3.10.106
(inclusive)
To
3.11
(exclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System
Linux Kernel by Linux
Version Range Affected
From
4.10
(inclusive)
To
4.14.4
(exclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System
Linux Kernel by Linux
Version Range Affected
From
3.16.42
(inclusive)
To
3.16.52
(exclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System
Linux Kernel by Linux
Version Range Affected
From
4.1.41
(inclusive)
To
4.1.48
(exclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System
Linux Kernel by Linux
Version Range Affected
From
3.12.73
(inclusive)
To
3.13
(exclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System
Linux Kernel by Linux
Version Range Affected
From
3.18.55
(inclusive)
To
3.18.86
(exclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System
Linux Kernel by Linux
Version Range Affected
From
3.2.87
(inclusive)
To
3.3
(exclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System
Linux Kernel by Linux
Version Range Affected
From
4.4.70
(inclusive)
To
4.4.104
(exclusive)
CPE Identifier
View Detailed Analysis
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://access.redhat.com/errata/RHSA-2018:0180
https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0
https://source.android.com/security/bulletin/pixel/2018-02-01
https://www.exploit-db.com/exploits/43199/
http://www.securityfocus.com/bid/102032
http://www.securitytracker.com/id/1040020
https://access.redhat.com/errata/RHSA-2018:0180
https://medium.com/bindecy/huge-dirty-cow-cve-2017-1000405-110eca132de0
https://source.android.com/security/bulletin/pixel/2018-02-01
https://www.exploit-db.com/exploits/43199/
http://www.securityfocus.com/bid/102032
http://www.securitytracker.com/id/1040020