Comments (2)
We could test if capsh
is present on machine, if it is use old approach in it isn't we can create mask manually. I created proof of concept script that you can use or modify for your liking:
#! /bin/bash
text="0000000020200420"
# as text is string in hex format we actually need to convert it to hex value
hex_value=$((16#$text))
# those masks were taken directly from https://github.com/torvalds/linux/blob/master/include/uapi/linux/capability.h
#cap_dac_read_search 2
#cap_net_raw 13
#cap_sys_module 16
#cap_sys_ptrace 19
#cap_sys_admin 21
# create mask with all unwanted flag
mask=$(((0x1 << 2) | (0x1 << 13) | (0x1 << 16) | (0x1 << 19) | (0x1 << 21)))
result=$((hex_value & mask))
if [ "$result" != 0 ]; then
printf "Not wanted flags set 0x%x\n" "$result"
else
echo "success"
fi
This should work on every platform, it doesn't name what flag is set but at least gives you its hex representation which is always something.
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It is resolved already.
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