SB2019052001 - Information disclosure in Linux kernel
Published: May 20, 2019
Security Bulletin ID
SB2019052001
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 disclosure (CVE-ID: CVE-2019-11833)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: 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/E:U/U:Clear
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to the Linux kernel does not zero out the unused memory region in the extent tree block within the fs/ext4/extents.c. A local user can gain unauthorized access to sensitive information on the system.
Remediation
Install update from vendor's website.
References
- https://github.com/torvalds/linux/commit/592acbf16821288ecdc4192c47e3774a4c48bb64
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.45
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.178
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.121
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.181