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Seperate ptrace() disabling into own file

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raja-grewal 2025-10-12 02:27:48 +00:00 • committed by GitHub
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24
usr/lib/sysctl.d/30_security-misc_ptrace-disable.conf#security-misc-shared Normal file
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@ -0,0 +1,24 @@
## Copyright (C) 2025 - 2025 ENCRYPTED SUPPORT LLC <adrelanos@whonix.org>
## See the file COPYING for copying conditions.
## Definitions:
## KSPP=yes: compliant with recommendations by the KSPP
## KSPP=partial: partially compliant with recommendations by the KSPP
## KSPP=no: not (currently) compliant with recommendations by the KSPP
## If there is no explicit KSPP compliance notice, the setting is not mentioned by the KSPP.
## Diable the usage of the ptrace() system call by all processes.
## Restrict ptrace() as it enables programs to inspect and modify other active processes.
## Prevents native code debugging which some programs use as a method to detect tampering.
## May cause breakages in 'anti-cheat' software and programs running under Proton/WINE.
##
## https://www.kernel.org/doc/html/latest/admin-guide/LSM/Yama.html#ptrace-scope
## https://en.wikipedia.org/wiki/Ptrace
## https://grapheneos.org/features#attack-surface-reduction
## https://github.com/GrapheneOS/os-issue-tracker/issues/651#issuecomment-917599928
## https://github.com/netblue30/firejail/issues/2860
##
## KSPP=yes
## KSPP sets the sysctl.
##
kernel.yama.ptrace_scope=3

4
usr/lib/sysctl.d/990-security-misc.conf#security-misc-shared
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@ -241,7 +241,9 @@ kernel.io_uring_disabled=2
## KSPP=yes ## KSPP=yes
## KSPP sets the sysctl. ## KSPP sets the sysctl.
## ##
kernel.yama.ptrace_scope=3 ## See /usr/lib/sysctl.d/30_security_misc-ptrace-disable.conf for implementation.
##
#kernel.yama.ptrace_scope=3
## Maximize bits of entropy for improved effectiveness of mmap ASLR. ## Maximize bits of entropy for improved effectiveness of mmap ASLR.
## The maximum number of bits depends on CPU architecture (the ones shown below are for x86). ## The maximum number of bits depends on CPU architecture (the ones shown below are for x86).