CVE-2017-7495
Linux Kernel ext4 Data Corruption Information Disclosure
Description
fs/ext4/inode.c in the Linux kernel before 4.6.2, when ext4 data=ordered mode is used, mishandles a needs-flushing-before-commit list, which allows local users to obtain sensitive information from other users' files in opportunistic circumstances by waiting for a hardware reset, creating a new file, making write system calls, and reading this file.
INFO
Published Date :
May 15, 2017, 6:29 p.m.
Last Modified :
Nov. 21, 2024, 3:32 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2017-7495 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-7495.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-7495 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-7495 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Feb. 12, 2023
Action Type Old Value New Value Changed Description A vulnerability was found in the Linux kernel where filesystems mounted with data=ordered mode may allow an attacker to read stale data from recently allocated blocks in new files after a system 'reset' by abusing ext4 mechanics of delayed allocation. fs/ext4/inode.c in the Linux kernel before 4.6.2, when ext4 data=ordered mode is used, mishandles a needs-flushing-before-commit list, which allows local users to obtain sensitive information from other users' files in opportunistic circumstances by waiting for a hardware reset, creating a new file, making write system calls, and reading this file. Removed CVSS V3 Red Hat, Inc. AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Removed Reference http://seclists.org/oss-sec/2017/q2/259 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2017:1842 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2017:2077 [No Types Assigned] Removed Reference https://access.redhat.com/errata/RHSA-2017:2669 [No Types Assigned] Removed Reference https://access.redhat.com/security/cve/CVE-2017-7495 [No Types Assigned] Removed Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed Description fs/ext4/inode.c in the Linux kernel before 4.6.2, when ext4 data=ordered mode is used, mishandles a needs-flushing-before-commit list, which allows local users to obtain sensitive information from other users' files in opportunistic circumstances by waiting for a hardware reset, creating a new file, making write system calls, and reading this file. A vulnerability was found in the Linux kernel where filesystems mounted with data=ordered mode may allow an attacker to read stale data from recently allocated blocks in new files after a system 'reset' by abusing ext4 mechanics of delayed allocation. Added CVSS V3 Red Hat, Inc. AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added Reference https://access.redhat.com/errata/RHSA-2017:2077 [No Types Assigned] Added Reference https://access.redhat.com/security/cve/CVE-2017-7495 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2017:1842 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2017:2669 [No Types Assigned] Added Reference http://seclists.org/oss-sec/2017/q2/259 [No Types Assigned] Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824 [No Types Assigned] -
CVE Modified by [email protected]
Sep. 09, 2017
Action Type Old Value New Value Added Reference https://source.android.com/security/bulletin/2017-09-01 [No Types Assigned] -
CVE Modified by [email protected]
Aug. 30, 2017
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/98491 [No Types Assigned] -
Initial Analysis by [email protected]
May. 26, 2017
Action Type Old Value New Value Added CVSS V2 (AV:L/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://github.com/torvalds/linux/commit/06bd3c36a733ac27962fea7d6f47168841376824 No Types Assigned https://github.com/torvalds/linux/commit/06bd3c36a733ac27962fea7d6f47168841376824 Issue Tracking, Patch, Third Party Advisory Changed Reference Type http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.2 No Types Assigned http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.2 Release Notes, Vendor Advisory Changed Reference Type http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824 No Types Assigned http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1450261 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1450261 Issue Tracking, Patch, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2017/05/15/2 No Types Assigned http://www.openwall.com/lists/oss-security/2017/05/15/2 Mailing List, Patch, Third Party Advisory Added CWE CWE-200 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:4.6.1:*:*:*:*:*:*:* (and previous)
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-7495 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-7495
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.05635
percentile