PT-2019-3247 · Linux+4 · Linux Kernel+4
Published
2019-02-09
·
Updated
2023-08-11
·
CVE-2019-11811
CVSS v3.1
7.0
High
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.0.4
Description
The issue is related to a use-after-free error in the Linux kernel, specifically in the ipmi si module, which can be exploited to execute arbitrary code or cause a denial of service. This is due to the use of memory after it has been freed, which can be triggered by a specially crafted request. The vulnerable code is located in the drivers/char/ipmi/ipmi si intf.c, drivers/char/ipmi/ipmi si mem io.c, and drivers/char/ipmi/ipmi si port io.c files. The exploitation can occur when attempting to read access to
/proc/ioports after the ipmi si module is removed.Recommendations
For Linux kernel versions prior to 5.0.4, update to version 5.0.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the
/proc/ioports file to minimize the risk of exploitation. Additionally, avoid removing the ipmi si module while the system is in use, as this can trigger the use-after-free error.Fix
Use After Free
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Linux Kernel
Red Hat
Suse