#VU19138 Use-after-free in Linux kernel - CVE-2019-11811
Published: July 10, 2019
Vulnerability identifier: #VU19138
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2019-11811
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local usre to elevate privileges on the system.
The vulnerability exists due to a use-after-free error when trying to read data from /proc/ioports after the ipmi_si module is removed (related to drivers/char/ipmi/ipmi_si_intf.c, drivers/char/ipmi/ipmi_si_mem_io.c, and drivers/char/ipmi/ipmi_si_port_io.c). A local user can exploit this issue to elevate privileges on the system.
Remediation
Install updates from vendor's website.
External links
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00071.html
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.4
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=401e7e88d4ef80188ffa07095ac00456f901b8c4
- https://github.com/torvalds/linux/commit/401e7e88d4ef80188ffa07095ac00456f901b8c4