Information disclosure in Linux kernel - CVE-2019-11833
Published: May 20, 2019 / Updated: May 30, 2020
Vulnerability identifier: #VU18533
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2019-11833
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2019-11833
Install updates from vendor's website.
Sources
- 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