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21 lines
1.3 KiB
Plaintext
21 lines
1.3 KiB
Plaintext
## Copyright (C) 2012 - 2022 ENCRYPTED SUPPORT LP <adrelanos@whonix.org>
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## See the file COPYING for copying conditions.
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## Please use "/etc/permission-hardening.d/20_user.conf" or
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## "/usr/local/etc/permission-hardening.d/20_user.conf" for your custom
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## configuration. When security-misc is updated, this file may be overwritten.
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## https://forums.whonix.org/t/restrict-root-access/7658/116
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## This restricts the file permissions of the sudo executable so that a vulnerability
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## in the program will not be exploitable by any users not in the "sudo" group. sudo
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## is a very complex program and is setuid so vulnerabilities in it can allow privilege
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## escalation, regardless of other root access restrictions. For example, the following
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## buffer overflow vulnerability could have been exploited by any user on the system:
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## https://www.openwall.com/lists/oss-security/2021/01/26/3
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## With this restriction, only users explicitly permitted to use sudo by being added to
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## the "sudo" group could exploit such vulnerabilities. For example, this would prevent a
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## compromised network-facing daemon (such as web servers, time synchronization daemons,
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## etc.) running as its own user from exploiting sudo to escalate privileges.
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#/usr/bin/sudo 4750 root sudo
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#/bin/sudo 4750 root sudo
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