Edit: /etc/apparmor.d/usr.bin.man (3448B)
# vim:syntax=apparmor
#include
/usr/bin/man {
#include
# Use a special profile when man calls anything groff-related. We only
# include the programs that actually parse input data in a non-trivial
# way, not wrappers such as groff and nroff, since the latter would need a
# broader profile.
/usr/bin/eqn rmCx -> &man_groff,
/usr/bin/grap rmCx -> &man_groff,
/usr/bin/pic rmCx -> &man_groff,
/usr/bin/preconv rmCx -> &man_groff,
/usr/bin/refer rmCx -> &man_groff,
/usr/bin/tbl rmCx -> &man_groff,
/usr/bin/troff rmCx -> &man_groff,
/usr/bin/vgrind rmCx -> &man_groff,
# Similarly, use a special profile when man calls decompressors and other
# simple filters.
/{,usr/}bin/bzip2 rmCx -> &man_filter,
/{,usr/}bin/gzip rmCx -> &man_filter,
/usr/bin/col rmCx -> &man_filter,
/usr/bin/compress rmCx -> &man_filter,
/usr/bin/iconv rmCx -> &man_filter,
/usr/bin/lzip.lzip rmCx -> &man_filter,
/usr/bin/tr rmCx -> &man_filter,
/usr/bin/xz rmCx -> &man_filter,
# Allow basically anything in terms of file system access, subject to DAC.
# The purpose of this profile isn't to confine man itself (that might be
# nice in the future, but is tricky since it's quite configurable), but to
# confine the processes it calls that parse untrusted data.
/** mrixwlk,
unix,
capability setuid,
capability setgid,
# Ordinary permission checks sometimes involve checking whether the
# process has this capability, which can produce audit log messages.
# Silence them.
deny capability dac_override,
deny capability dac_read_search,
signal peer=@{profile_name},
signal peer=/usr/bin/man//&man_groff,
signal peer=/usr/bin/man//&man_filter,
# Site-specific additions and overrides. See local/README for details.
#include
}
profile man_groff {
#include
# Recent kernels revalidate open FDs, and there are often some still
# open on TTYs. This is temporary until man learns to close irrelevant
# open FDs before execve.
#include
# man always runs its groff pipeline with the input file open on stdin,
# so we can skip .
/usr/bin/eqn rm,
/usr/bin/grap rm,
/usr/bin/pic rm,
/usr/bin/preconv rm,
/usr/bin/refer rm,
/usr/bin/tbl rm,
/usr/bin/troff rm,
/usr/bin/vgrind rm,
/etc/groff/** r,
/etc/papersize r,
/usr/lib/groff/site-tmac/** r,
/usr/share/groff/** r,
/tmp/groff* rw,
signal peer=/usr/bin/man,
# @{profile_name} doesn't seem to work here.
signal peer=/usr/bin/man//&man_groff,
}
profile man_filter {
#include
# Recent kernels revalidate open FDs, and there are often some still
# open on TTYs. This is temporary until man learns to close irrelevant
# open FDs before execve.
#include
/{,usr/}bin/bzip2 rm,
/{,usr/}bin/gzip rm,
/usr/bin/col rm,
/usr/bin/compress rm,
/usr/bin/iconv rm,
/usr/bin/lzip.lzip rm,
/usr/bin/tr rm,
/usr/bin/xz rm,
# Manual pages can be more or less anywhere, especially with "man -l", and
# there's no harm in allowing wide read access here since the worst it can
# do is feed data to the invoking man process.
/** r,
# Allow writing cat pages.
/var/cache/man/** w,
signal peer=/usr/bin/man,
# @{profile_name} doesn't seem to work here.
signal peer=/usr/bin/man//&man_filter,
}