40 lines
1.4 KiB
Bash
40 lines
1.4 KiB
Bash
# Check whether RPATHs or wrapper scripts contain references to
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# $TMPDIR. This is a serious security bug because it allows any user
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# to inject files into search paths of other users' processes.
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#
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# It might be better to have Nix scan build output for any occurrence
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# of $TMPDIR (which would also be good for reproducibility), but at
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# the moment that would produce too many spurious errors (e.g. debug
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# info or assertion messages that refer to $TMPDIR).
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fixupOutputHooks+=('if [[ -z "${noAuditTmpdir-}" && -e "$prefix" ]]; then auditTmpdir "$prefix"; fi')
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auditTmpdir() {
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local dir="$1"
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[ -e "$dir" ] || return 0
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echo "checking for references to $TMPDIR/ in $dir..."
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local i
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find "$dir" -type f -print0 | while IFS= read -r -d $'\0' i; do
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if [[ "$i" =~ .build-id ]]; then continue; fi
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if isELF "$i"; then
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if { printf :; patchelf --print-rpath "$i"; } | grep -q -F ":$TMPDIR/"; then
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echo "RPATH of binary $i contains a forbidden reference to $TMPDIR/"
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exit 1
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fi
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fi
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if isScript "$i"; then
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if [ -e "$(dirname "$i")/.$(basename "$i")-wrapped" ]; then
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if grep -q -F "$TMPDIR/" "$i"; then
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echo "wrapper script $i contains a forbidden reference to $TMPDIR/"
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exit 1
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fi
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fi
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fi
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done
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}
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