Title: InfraPower PPS-02-S Q213V1 Local File Disclosure Vulnerability
Advisory ID: ZSL-2016-5370
Type: Local/Remote
Impact: Exposure of System Information, Exposure of Sensitive Information
Risk: (4/5)
Release Date: 28.10.2016

Summary

InfraPower Manager PPS-02-S is a FREE built-in GUI of each IP dongle ( IPD-02-S only ) to remotely monitor the connected PDUs. Patented IP Dongle provides IP remote access to the PDUs by a true network IP address chain. Only 1xIP dongle allows access to max. 16 PDUs in daisy chain - which is a highly efficient cient application for saving not only the IP remote accessories cost, but also the true IP addresses required on the PDU management.

Description

InfraPower suffers from a file disclosure vulnerability when input passed thru the 'file' parameter to 'ListFile.php' script is not properly verified before being used to read files. This can be exploited to disclose contents of files from local resources.

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/ListFile.php:
------------------------

8: if(isset($_GET['file'])){
9: $handle = $_GET['file'];
10: $fp = fopen('/ramdisk/'.$handle, 'r');
11: while(!feof($fp)){
12: $tmp=fgets($fp,2000);
13: $tmp = str_replace("\n","<br />",$tmp);
14: echo $tmp;
15: }
16: fclose($fp);
17: }

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Vendor

Austin Hughes Electronics Ltd. - http://www.austin-hughes.com

Affected Version

Q213V1 (Firmware: V2395S)

Tested On

Linux 2.6.28 (armv5tel)
lighttpd/1.4.30-devel-1321
PHP/5.3.9
SQLite/3.7.10

Vendor Status

[27.09.2016] Vulnerability discovered.
[03.10.2016] Vendor contacted.
[04.10.2016] Vendor responds asking more details.
[04.10.2016] Sent details to the vendor.
[06.10.2016] Vendor has released a new firmware version that addresses these issues.
[28.10.2016] Public security advisory released.

PoC

infrapower_lfi.txt

Credits

Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>

References

[1] https://www.exploit-db.com/exploits/40642/
[2] https://packetstormsecurity.com/files/139419
[3] https://cxsecurity.com/issue/WLB-2016100261
[4] https://exchange.xforce.ibmcloud.com/vulnerabilities/118417

Changelog

[28.10.2016] - Initial release
[31.10.2016] - Added reference [1], [2] and [3]
[02.11.2016] - Added reference [4]

Contact

Zero Science Lab

Web: http://www.zeroscience.mk
e-mail: lab@zeroscience.mk