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Distro_debian
Last edited by Steve Beattie 2 years ago
In Stock Debian
AppArmor should be available out of the box in the latest Debian distros. Please see http://wiki.debian.org/AppArmor
To enable the AppArmor in the Debian kernel, add “security=apparmor” to the kernel parameters, like this:
sed -i -e 's/GRUB_CMDLINE_LINUX_DEFAULT="/&security=apparmor /' /etc/default/grub
This sed command results in the following /etc/default/grub line on my system:
GRUB_CMDLINE_LINUX_DEFAULT=“security=apparmor quiet”
Then run
update-grub
Experimental AppArmor on Debian Jessie amd64
Kernel
Obtaining
mkdir -p ~/apparmor/ && cd ~/apparmor/
wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.10.2.tar.xz
tar -xJf linux-3.10.2.tar.xz
cd linux-3.10.2/
Building
cd ~/apparmor/linux-3.10.2/
See if we can reuse the existing kernel configuration (CONFIG_IKCONFIG=y, CONFIG_IKCONFIG_PROC=y):
cp /proc/config.gz ./ && gzip -d config.gz
Tweak the kernel, enable AppArmor:
apt-get install libncurses-dev
make menuconfig
“Security options” ---> “AppArmor support”, “Enable AppArmor 2.4 compatability”
Installing
aptitude install dpkg-dev bc
cd ~/apparmor/linux-3.10.2/
make deb-pkg
dpkg -i ../linux-firmware-image_{version}.deb
dpkg -i ../linux-headers-{version}.deb
dpkg -i ../linux-image-{version}.deb
If the kernel is installed on another host, then symlinks for DKMS should be fixed.
rm /lib/modules/{version}/build; ln -s /usr/src/linux-headers-{version} /lib/modules/{version}/build
rm /lib/modules/{version}/source; ln -s /usr/src/linux-headers-{version} /lib/modules/{version}/source
About dpkg -i ../linux-libc-{version}.deb: /usr/include/x86_64-linux-gnu/asm seems to be missing from latest linux-libc-{version}.deb. If you installed linux-libc-{version}.deb, you can downgrade to Debian version with aptitude install linux-libc-dev=3.0.0-3.
Finally:
update-grub
Checking
Reboot under new kernel:
/sbin/shutdown -r now
or
reboot
Now see if AppArmor is loaded and enabled (should print “Y”):
cat /sys/module/apparmor/parameters/enabled
Tools
aptitude install apparmor apparmor-profiles
/etc/init.d/apparmor restart
Checking
cat /var/log/audit/audit.log | grep apparmor_parser
should display something like
type=AVC msg=audit(1316949034.097:108): apparmor=“STATUS” operation=“profile_load” name=“/bin/ping” pid=5207 comm=“apparmor_parser”
Tuning logs
Audit data by default is dropped into /var/log/messages via rsyslogd. That way, the data is severely capped by the kernel in order not to overload the messages log. To make audit data usable with AppArmor we should install auditd and tune it to keep large amounts of data:
apt-get install auditd
sed -i -re 's/max_log_file = [0-9]+/max_log_file = 200/' /etc/audit/auditd.conf
/etc/init.d/auditd restart
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21 Aug 2020
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Multiple vulnerabilities found in Wireless IP Camera (P2P) WIFICAM cameras and vulnerabilities in custom http server
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The Wireless IP Camera (P2P) WIFICAM is a Chinese web camera which allows to stream remotely.
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