Title: Selea Targa IP OCR-ANPR Camera Unauthenticated Remote Code Execution
Advisory ID: ZSL-2021-5620
Type: Local/Remote
Impact: System Access, DoS
Risk: (5/5)
Release Date: 21.01.2021

Summary

IP camera with optical character recognition (OCR) software for automatic number plate recognition (ANPR) also equipped with ADR system that enables it to read the Hazard Identification Number (HIN, also known as the Kemler Code) and UN number of any vehicle captured in free-flow mode. TARGA is fully accurate in reading number plates of vehicles travelling at high speed. Its varifocal, wide-angle lens makes this camera suitable for all installation conditions. Its built-in OCR software works as an automatic and independent system without the need of a computer, thus giving autonomy to the device even in the event of an interruption in the connection between the camera and the operations centre.

Description

Selea suffers from an authenticated command injection vulnerability. This can be exploited to inject and execute arbitrary shell commands as the www-data user through the 'addr' and 'port' HTTP GET parameters in utils.php page. Chaining the unauthenticated LFI issue an attacker can grab credentials, authenticate and execute system commands.

--------------------------------------------------------------------------------

/mnt/app/scripts/address_check.sh:
----------------------------------

01: #!/bin/sh
02: . /mnt/app/scripts/env.sh
03: . /mnt/app/scripts/log.sh
04:
05: CMD="$1"
06: ADDR="$2"
07: PORT="$3"
08:
09: if [ "$CMD" == "ping" ]; then
10: RESULT=$(/bin/ping -I eth0 -W 1 -q -c 1 "$ADDR" 2>&1 )
11: elif [ "$CMD" == "port" ]; then
12: log "/usr/bin/nc -w 1 -v -z $ADDR $PORT"
13: RESULT=$(/usr/bin/nc -w 1 -v -z "$ADDR" "$PORT" 2>&1 )
14: fi
15:
16: echo -e "$RESULT"

--------------------------------------------------------------------------------

Vendor

Selea s.r.l. - https://www.selea.com

Affected Version

Model: iZero
Targa 512
Targa 504
Targa Semplice
Targa 704 TKM
Targa 805
Targa 710 INOX
Targa 750
Targa 704 ILB
Firmware: BLD201113005214
BLD201106163745
BLD200304170901
BLD200304170514
BLD200303143345
BLD191118145435
BLD191021180140
BLD191021180140
CPS: 4.013(201105)
3.100(200225)
3.005(191206)
3.005(191112)

Tested On

GNU/Linux 3.10.53 (armv7l)
PHP/5.6.22
selea_httpd
HttpServer/0.1
SeleaCPSHttpServer/1.1

Vendor Status

[07.11.2020] Vulnerability discovered.
[09.11.2020] Vendor contacted.
[09.11.2020] Vendor responds asking for explanation.
[09.11.2020] Asked vendor for security personnel and explained about security submissions and risk/impact.
[10.11.2020] Vendor responds asking for details.
[11.11.2020] Sent details to the vendor (high-level, asked for PGP).
[14.11.2020] Asked vendor for status update.
[18.11.2020] Vendor responds: We already reviewed and fixed most of the vulnerabilities you described in newer version of both camera firmware and the CarPlateServer software.
[19.11.2020] Replied to the vendor.
[20.11.2020] Vendor will get back to us.
[06.12.2020] Asked vendor for status update.
[09.12.2020] Vendor in final test phase for new releases. Estimated release date: End of year.
[09.12.2020] Replied to the vendor.
[17.01.2021] Asked vendor for status update.
[20.01.2021] No response from the vendor.
[21.01.2021] Public security advisory released.

PoC

selea_rce.sh

Credits

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

References

[1] https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5616.php
[2] https://www.exploit-db.com/exploits/49460
[3] https://packetstormsecurity.com/files/161064
[4] https://exchange.xforce.ibmcloud.com/vulnerabilities/195505

Changelog

[21.01.2021] - Initial release
[26.01.2021] - Added reference [2], [3] and [4]

Contact

Zero Science Lab

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