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Fix privilege for passwd CVE-2025-7195 #75

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Merged
merged 1 commit into from
Oct 22, 2025
Merged

Fix privilege for passwd CVE-2025-7195 #75

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10 changes: 4 additions & 6 deletions build/bin/user_setup
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Original file line number Diff line number Diff line change
Expand Up @@ -2,12 +2,10 @@
set -x

# ensure $HOME exists and is accessible by group 0 (we don't know what the runtime UID will be)
mkdir -p ${HOME}
chown ${USER_UID}:0 ${HOME}
chmod ug+rwx ${HOME}

# runtime user will need to be able to self-insert in /etc/passwd
chmod g+rw /etc/passwd
echo "${USER_NAME}:x:${USER_UID}:0:${USER_NAME} user:${HOME}:/sbin/nologin" >> /etc/passwd
mkdir -p "${HOME}"
chown "${USER_UID}:0" "${HOME}"
chmod ug+rwx "${HOME}"

# no need for this script to remain in the image after running
rm $0