SB2017051532 - Information exposure in Linux kernel ext4
Published: May 15, 2017
Security Bulletin ID
SB2017051532
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Information exposure (CVE-ID: CVE-2017-7495)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to information exposure error within the check_block_validity() and ext4_write_end() functions in fs/ext4/inode.c. A local user can gain access to sensitive information.
Remediation
Install update from vendor's website.
References
- https://github.com/torvalds/linux/commit/06bd3c36a733ac27962fea7d6f47168841376824
- https://bugzilla.redhat.com/show_bug.cgi?id=1450261
- http://www.openwall.com/lists/oss-security/2017/05/15/2
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.2
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824
- http://www.securityfocus.com/bid/98491
- https://source.android.com/security/bulletin/2017-09-01