Vulnerability Details : CVE-2017-7495
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.
Vulnerability category: Information leak
Products affected by CVE-2017-7495
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-7495
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 13 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-7495
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:P/I:N/A:N |
3.9
|
2.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2017-7495
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-7495
-
https://source.android.com/security/bulletin/2017-09-01
Android Security Bulletin—September 2017 | Android Open Source Project
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https://bugzilla.redhat.com/show_bug.cgi?id=1450261
1450261 – (CVE-2017-7495) CVE-2017-7495 kernel: ext4: power failure during write(2) causes on-disk information leakIssue Tracking;Patch;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2017/05/15/2
oss-security - CVE-2017-7495 kernel : information leak on ext4 when hardware reset.Mailing List;Patch;Third Party Advisory
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http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824
kernel/git/torvalds/linux.git - Linux kernel source treeIssue Tracking;Patch;Third Party Advisory
-
http://www.securityfocus.com/bid/98491
Linux Kernel CVE-2017-7495 Local Information Disclosure Vulnerability
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http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.2
Release Notes;Vendor Advisory
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https://github.com/torvalds/linux/commit/06bd3c36a733ac27962fea7d6f47168841376824
ext4: fix data exposure after a crash · torvalds/linux@06bd3c3 · GitHubIssue Tracking;Patch;Third Party Advisory
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