CVE-2017-7495

LOW

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.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.2

http://www.openwall.com/lists/oss-security/2017/05/15/2

http://www.securityfocus.com/bid/98491

https://bugzilla.redhat.com/show_bug.cgi?id=1450261

https://github.com/torvalds/linux/commit/06bd3c36a733ac27962fea7d6f47168841376824

https://source.android.com/security/bulletin/2017-09-01

Details

Source: MITRE

Published: 2017-05-15

Updated: 2017-09-09

Type: CWE-200

Risk Information

CVSS v2.0

Base Score: 2.1

Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3.0

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM