Dockerfile

# Build the faulty version of UnrealIRCd.
# This is the oldest version of Ubuntu that seems to work w/Docker.
FROM ubuntu:14.04 as unrealircd
RUN apt-get -y update && apt-get -y install automake build-essential git libssl-dev wget
RUN wget http://stalkr.net/files/unrealircd/Unreal3.2.8.1_backdoor.tar.gz
COPY Unreal3.2.8.1_backdoor.tar.gz Unreal3.2.8.1_backdoor.tar.gz
RUN tar xzf Unreal3.2.8.1_backdoor.tar.gz
WORKDIR /Unreal3.2
# This change was required to get the build to go through.
RUN sed -i 's/inline void parse_addlag/void parse_addlag/' src/parse.c
RUN ./configure
# This extra call to gcc was also required to build.
RUN make; cd src/;gcc -I../include -I/Unreal3.2/extras/regexp/include -I/Unreal3.2/extras/c-ares/include -L../extras/c-ares/lib -pipe -g -O2 -funsigned-char -fno-strict-aliasing -Wno-pointer-sign    -o ircd timesynch.o res.o s_bsd.o auth.o aln.o channel.o cloak.o crule.o dbuf.o events.o fdlist.o hash.o help.o ircd.o ircsprintf.o list.o lusers.o match.o modules.o packet.o parse.o s_auth.o s_conf.o s_debug.o s_err.o s_extra.o s_kline.o s_misc.o s_numeric.o s_serv.o s_svs.o  socket.o ssl.o s_user.o charsys.o scache.o send.o support.o umodes.o version.o whowas.o zip.o cidr.o random.o extcmodes.o extbans.o md5.o api-isupport.o api-command.o   -lcrypt -lnsl  -L../extras/regexp/lib -ltre -lcares -lrt -ldl

# A newer OS to build and use GTIRB.
FROM archlinux/base

# Install the latest GTIRB, GTIRB-pprinter, and DDisasm.
RUN pacman --noconfirm -Syu archlinux-keyring && pacman -Syu --noconfirm base-devel boost git protobuf autoconf automake bison flex fakeroot sqlite libtool pkg-config zlib mcpp
RUN sed -i "s/^\(OPT_LONG=(\)/\1'asroot' /;s/EUID == 0/1 == 0/" /usr/bin/makepkg
RUN git clone --depth 1 https://aur.archlinux.org/souffle-git.git /souffle-aur
RUN sed -i "/make check/d" /souffle-aur/PKGBUILD
RUN cd /souffle-aur && makepkg --noconfirm -si
RUN for pkg in gtirb-git gtirb-pprinter-git ddisasm-git;do                                            \
    git clone --depth 1 https://aur.archlinux.org/${pkg}.git && cd ${pkg} && makepkg --noconfirm -si; \
    done

# Copy in the UnrealIRCd binary.
COPY --from=unrealircd /Unreal3.2/ /Unreal3.2/
COPY --from=unrealircd /Unreal3.2/src/ircd /ircd

# Analyze the resulting ircd binary.
RUN ddisasm /ircd --ir /ircd.gtirb
RUN gtirb-pprinter /ircd.gtirb -o /ircd.s

# Inspect with GTIRB.
COPY blog.cpp blog.cpp
RUN g++ --std=c++17 -lgtirb blog.cpp
RUN ./a.out /ircd.gtirb 1

# Repair
RUN sed 's/system@PLT/puts@PLT/' -i ircd.s
RUN gcc ircd.s -o ircd-fixed -lcrypt -lrt -ldl -lc -lpthread -no-pie