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PEASS-ng/linPEAS/builder/linpeas_parts/functions/enumerateDockerSockets.sh
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# Title: Container - enumerateDockerSockets
# ID: enumerateDockerSockets
# Author: Carlos Polop
# Last Update: 21-03-2026
# Description: Search interesting container runtime, orchestration, and build sockets that could expose high-impact APIs from inside a container.
# License: GNU GPL
# Version: 1.0
# Functions Used: echo_not_found
# Global Variables: $GREP_DOCKER_SOCK_INFOS, $GREP_DOCKER_SOCK_INFOS_IGNORE
# Initial Functions:
# Generated Global Variables: $SEARCHED_DOCKER_SOCKETS, $docker_enumerated, $dockerVersion, $int_sock, $sockInfoResponse, $IFS, $OLDIFS
# Fat linpeas: 0
# Small linpeas: 1
enumerateDockerSockets() {
dockerVersion="$(echo_not_found)"
if ! [ "$SEARCHED_DOCKER_SOCKETS" ]; then
SEARCHED_DOCKER_SOCKETS="1"
OLDIFS="$IFS"
IFS='
'
# NOTE: This is intentionally "lightweight" (checks common runtime socket names) and avoids
# pseudo filesystems (/sys, /proc) to reduce noise and latency.
for int_sock in $(find / \
-path "/sys" -prune -o \
-path "/proc" -prune -o \
-type s \( \
-name "docker.sock" -o \
-name "docker.socket" -o \
-name "cri-dockerd.sock" -o \
-name "dockershim.sock" -o \
-name "containerd.sock" -o \
-name "containerd.sock.ttrpc" -o \
-name "crio.sock" -o \
-name "podman.sock" -o \
-name "kubelet.sock" -o \
-name "buildkitd.sock" -o \
-name "buildkit.sock" -o \
-name "firecracker-containerd.sock" -o \
-name "frakti.sock" -o \
-name "rktlet.sock" \
\) -print 2>/dev/null); do
# Basic permissions hint (you generally need write perms to connect to a unix socket).
if [ -w "$int_sock" ]; then
if echo "$int_sock" | grep -Eq "docker"; then
echo "You have write permissions over Docker socket $int_sock" | sed -${E} "s,$int_sock,${SED_RED_YELLOW},g"
else
echo "You have write permissions over interesting socket $int_sock" | sed -${E} "s,$int_sock,${SED_RED},g"
fi
else
echo "You don't have write permissions over interesting socket $int_sock" | sed -${E} "s,$int_sock,${SED_GREEN},g"
fi
# Validate whether this looks like a Docker-compatible API socket (amicontained-style) when curl exists.
docker_enumerated=""
if [ "$(command -v curl 2>/dev/null || echo -n '')" ]; then
sockInfoResponse="$(curl -s --max-time 2 --unix-socket "$int_sock" http://localhost/info 2>/dev/null)"
if echo "$sockInfoResponse" | grep -q "ServerVersion"; then
echo "Valid Docker API socket: $int_sock" | sed -${E} "s,$int_sock,${SED_RED_YELLOW},g"
dockerVersion=$(echo "$sockInfoResponse" | tr ',' '\n' | grep 'ServerVersion' | cut -d'"' -f 4)
echo "$sockInfoResponse" | tr ',' '\n' | grep -E "$GREP_DOCKER_SOCK_INFOS" | grep -v "$GREP_DOCKER_SOCK_INFOS_IGNORE" | tr -d '"'
docker_enumerated="1"
fi
fi
# Fallback to docker CLI if curl is missing or the /info request didn't work.
# Use DOCKER_HOST so we can target non-default socket paths when possible.
if [ "$(command -v docker 2>/dev/null || echo -n '')" ] && ! [ "$docker_enumerated" ]; then
if [ -w "$int_sock" ] && echo "$int_sock" | grep -Eq "docker"; then
sockInfoResponse="$(DOCKER_HOST="unix://$int_sock" docker info 2>/dev/null)"
if [ "$sockInfoResponse" ]; then
dockerVersion=$(echo "$sockInfoResponse" | grep -i "^ Server Version:" | awk '{print $4}' | head -n 1)
printf "%s\n" "$sockInfoResponse" | grep -E "$GREP_DOCKER_SOCK_INFOS" | grep -v "$GREP_DOCKER_SOCK_INFOS_IGNORE" | tr -d '"'
fi
fi
fi
done
IFS="$OLDIFS"
fi
}