mirror of
https://github.com/Kicksecure/security-misc.git
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97 lines
3.1 KiB
RPMSpec
97 lines
3.1 KiB
RPMSpec
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Name: security-misc
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Version: @VERSION@
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Release: 1%{?dist}
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Summary: enhances misc security settings
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License: GPL-3+-with-additional-terms-1
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URL: https://github.com/Whonix/security-misc
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Source0: %{name}-%{version}.tar.xz
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BuildRequires: dpkg-dev
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BuildRequires: genmkfile
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Requires: make
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BuildArch: noarch
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%description
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The following settings are changed:
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deactivates previews in Dolphin;
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deactivates previews in Nautilus;
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deactivates thumbnails in Thunar;
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deactivates TCP timestamps;
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deactivates Netfilter's connection tracking helper;
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TCP time stamps (RFC 1323) allow for tracking clock
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information with millisecond resolution. This may or may not allow an
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attacker to learn information about the system clock at such
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a resolution, depending on various issues such as network lag.
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This information is available to anyone who monitors the network
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somewhere between the attacked system and the destination server.
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It may allow an attacker to find out how long a given
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system has been running, and to distinguish several
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systems running behind NAT and using the same IP address. It might
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also allow one to look for clocks that match an expected value to find the
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public IP used by a user.
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Hence, this package disables this feature by shipping the
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/etc/sysctl.d/tcp_timestamps.conf configuration file.
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Note that TCP time stamps normally have some usefulness. They are
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needed for:
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* the TCP protection against wrapped sequence numbers; however, to
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trigger a wrap, one needs to send roughly 2^32 packets in one
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minute: as said in RFC 1700, "The current recommended default
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time to live (TTL) for the Internet Protocol (IP) [45,105] is 64".
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So, this probably won't be a practical problem in the context
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of Anonymity Distributions.
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* "Round-Trip Time Measurement", which is only useful when the user
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manages to saturate their connection. When using Anonymity Distributions,
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probably the limiting factor for transmission speed is rarely the capacity
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of the user connection.
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Netfilter's connection tracking helper module increases kernel attack
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surface by enabling superfluous functionality such as IRC parsing in
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the kernel. (!)
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Hence, this package disables this feature by shipping the
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/etc/sysctl.d/nf_conntrack_helper.conf configuration file.
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%prep
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%setup -q
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%build
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make %{?_smp_mflags}
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%install
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%make_install
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%files
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%license debian/copyright
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/etc/X11/Xsession.d/50security-misc
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/etc/default/grub.d/40_kernel_hardening.cfg
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/etc/modprobe.d/30_nf_conntrack_helper_disable.conf
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/etc/modprobe.d/uncommon-network-protocols.conf
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/etc/skel/.config/xfce4/xfconf/xfce-perchannel-xml/thunar.xml
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/etc/sysctl.d/fs_protected.conf
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/etc/sysctl.d/harden_bpf.conf
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/etc/sysctl.d/kexec.conf
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/etc/sysctl.d/kptr_restrict.conf
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/etc/sysctl.d/mmap_aslr.conf
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/etc/sysctl.d/ptrace_scope.conf
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/etc/sysctl.d/tcp_hardening.conf
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/etc/sysctl.d/tcp_timestamps.conf
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/usr/lib/security-misc/apt-get-update
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/usr/lib/security-misc/apt-get-update-sanity-test
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/usr/lib/security-misc/apt-get-wrapper
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/usr/share/glib-2.0/schemas/30_security-misc.gschema.override
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/usr/share/lintian/overrides/security-misc
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/usr/share/security-misc/dolphinrc
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%changelog
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@CHANGELOG@
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