Uncategorized

CVE-2017-11472: Linux kernel ACPI KASLR vulnerability

The acpi_ns_terminate() function in drivers/acpi/acpica/nsutils.c in the Linux kernel before 4.12 does not flush the operand cache and causes a kernel stack dump, which allows local users to obtain sensitive information from kernel memory and bypass the KASLR protection mechanism (in the kernel through 4.9) via a crafted ACPI table.

[…]This causes a security threat because the old kernel (<= 4.9) shows memory locations of kernel functions in stack dump, therefore kernel ASLR can be neutralized. To fix ACPI operand leak for enhancing security, I made a patch which removes the ACPI_EXEC_APP define in acpi_ns_terminate() function for executing the deletion code unconditionally.[…]

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11472
https://nvd.nist.gov/vuln/detail/CVE-2017-11472
https://vuldb.com/?id.104315
https://github.com/acpica/acpica/commit/a23325b2e583556eae88ed3f764e457786bf4df6
https://github.com/torvalds/linux/commit/3b2d69114fefa474fca542e51119036dceb4aa6f

 

Standard

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s