From 4ee1f31cf80019c5907876576d6dfd49368d660f Mon Sep 17 00:00:00 2001
From: Gerhard Rieger <gerhard@dest-unreach.org>
Date: Fri, 6 Dec 2024 11:42:09 +0100
Subject: [PATCH] Version 1.8.0.2 - CVE-2024-54661: Arbitrary file overwrite in
 readline.sh

CVE: CVE-2024-54661
Upstream-Status: Backport [https://repo.or.cz/socat.git/commitdiff/4ee1f31cf80019c5907876576d6dfd49368d660f]
Signed-off-by: Peter Marko <peter.marko@siemens.com>
---
 readline.sh | 10 +++++++--
 test.sh     | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 2 deletions(-)

diff --git a/readline.sh b/readline.sh
index b6f8438..1045303 100755
--- a/readline.sh
+++ b/readline.sh
@@ -22,9 +22,15 @@ if [ "$withhistfile" ]; then
 else
     HISTOPT=
 fi
-mkdir -p /tmp/$USER || exit 1
 #
 #
 
-exec socat -d readline"$HISTOPT",noecho='[Pp]assword:' exec:"$PROGRAM",sigint,pty,setsid,ctty,raw,echo=0,stderr 2>/tmp/$USER/stderr2
+if test -w .; then
+    STDERR=./socat-readline.${1##*/}.log
+    rm -f $STDERR
+else
+    STDERR=/dev/null
+fi
+
+exec socat -d readline"$HISTOPT",noecho='[Pp]assword:' exec:"$PROGRAM",sigint,pty,setsid,ctty,raw,echo=0,stderr 2>$STDERR
 
diff --git a/test.sh b/test.sh
index 46bebf8..5204ac7 100755
--- a/test.sh
+++ b/test.sh
@@ -19154,6 +19154,69 @@ esac
 N=$((N+1))
 
 
+# Test the readline.sh file overwrite vulnerability
+NAME=READLINE_SH_OVERWRITE
+case "$TESTS" in
+*%$N%*|*%functions%*|*%bugs%*|*%readline%*|*%security%*|*%$NAME%*)
+TEST="$NAME: Test the readline.sh file overwrite vulnerability"
+# Create a symlink /tmp/$USER/stderr2 pointing to a temporary file,
+# run readline.sh
+# When the temporary file is kept the test succeeded
+if ! eval $NUMCOND; then :
+elif ! cond=$(checkconds \
+		  "" \
+		  "" \
+		  "readline.sh" \
+		  "" \
+		  "" \
+		  "" \
+		  "" ); then
+    $PRINTF "test $F_n $TEST... ${YELLOW}$cond${NORMAL}\n" $N
+    numCANT=$((numCANT+1))
+    listCANT="$listCANT $N"
+    namesCANT="$namesCANT $NAME"
+else
+    tf="$td/test$N.file"
+    te="$td/test$N.stderr"
+    tdiff="$td/test$N.diff"
+    da="test$N $(date) $RANDOM"
+    echo "$da" >"$tf"
+    ln -sf "$tf" /tmp/$USER/stderr2
+    CMD0="readline.sh cat"
+    printf "test $F_n $TEST... " $N
+    $CMD0 </dev/null >/dev/null 2>"${te}0"
+    rc0=$?
+#    if [ "$rc0" -ne 0 ]; then
+#	$PRINTF "$CANT (rc0=$rc0)\n"
+#	echo "$CMD0"
+#	cat "${te}0" >&2
+#	numCANT=$((numCANT+1))
+#	listCANT="$listCANT $N"
+#	namesCANT="$namesCANT $NAME"
+#    elif ! echo "$da" |diff - "$tf" >$tdiff; then
+    if ! echo "$da" |diff - "$tf" >$tdiff; then
+	$PRINTF "$FAILED (diff)\n"
+	echo "$CMD0 &"
+	cat "${te}0" >&2
+	echo "// diff:" >&2
+	cat "$tdiff" >&2
+	numFAIL=$((numFAIL+1))
+	listFAIL="$listFAIL $N"
+	namesFAIL="$namesFAIL $NAME"
+    else
+	$PRINTF "$OK\n"
+	if [ "$VERBOSE" ]; then echo "$CMD0 &"; fi
+	if [ "$DEBUG" ];   then cat "${te}0" >&2; fi
+	if [ "$VERBOSE" ]; then echo "$CMD1"; fi
+	if [ "$DEBUG" ];   then cat "${te}1" >&2; fi
+	numOK=$((numOK+1))
+	listOK="$listOK $N"
+    fi
+fi # NUMCOND
+ ;;
+esac
+N=$((N+1))
+
 # end of common tests
 
 ##################################################################################
-- 
2.30.2