Guide to the Secure Configuration of Debian 12
Rules, Groups, and Values defined within the XCCDF Benchmark
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Disable vsyscall mapping
This config disables the vsyscall mapping at all. Attempts to use the vsyscalls will be reported to dmesg, so that either old or malicious userspac...Rule Medium Severity -
Disable vsyscall emulate execution only
The kernel traps and emulates calls into the fixed vsyscall address mapping and does not allow reads. This configuration is available from kernel 5...Rule Medium Severity -
Disable the LDT (local descriptor table)
Linux can allow user programs to install a per-process x86 Local Descriptor Table (LDT) using the modify_ldt(2) system call. This is required to ru...Rule Medium Severity -
Enable poison of pages after freeing
Fill the pages with poison patterns after free_pages() and verify the patterns before alloc_pages. This does have a potential performance impact if...Rule Medium Severity -
Perform full reference count validation
Enabling this switches the refcounting infrastructure from a fast unchecked atomic_t implementation to a fully state checked implementation, which ...Rule Medium Severity
Node 2
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Modules