exploit the possibilities

TP-LINK Cloud Cameras NCXXX SetEncryptKey Command Injection

TP-LINK Cloud Cameras NCXXX SetEncryptKey Command Injection
Posted May 1, 2020
Authored by Pietro Oliva

TP-LINK Cloud Cameras including products NC260 and NC450 suffer from a command injection vulnerability. The issue is located in the httpSetEncryptKeyRpm method (handler for /setEncryptKey.fcgi) of the ipcamera binary, where the user-controlled EncryptKey parameter is used directly as part of a command line to be executed as root without any input sanitization.

tags | exploit, root
advisories | CVE-2020-12111
MD5 | 9ca6bd89ed55046f95b5938be59cca18

TP-LINK Cloud Cameras NCXXX SetEncryptKey Command Injection

Change Mirror Download
Vulnerability title: TP-LINK Cloud Cameras NCXXX SetEncryptKey Command Injection
Author: Pietro Oliva
CVE: CVE-2020-12111
Vendor: TP-LINK
Product: NC260, NC450
Affected version: NC260 <= 1.5.2 build 200304, NC450 <= 1.5.3 build 200304
Fixed version: NC260 <= 1.5.3 build_200401, NC450 <= 1.5.4 build 200401

Description:
The issue is located in the httpSetEncryptKeyRpm method (handler for
/setEncryptKey.fcgi) of the ipcamera binary, where the user-controlled
EncryptKey parameter is used directly as part of a command line to be executed
as root without any input sanitization.

Impact:
Attackers could exploit this vulnerability to remotely execute commands as root
on affected devices.

Exploitation:
An attacker would first need to authenticate to the web interface and make a
POST request to /setEncryptKey.fcgi. Commands to be executed with root
privileges can be injected in the EncryptKey parameter.

Evidence:
The disassembly of affected code from an NC450 camera is shown below:

httpSetEncryptKeyRpm:

0x00491728 lw a0, -0x7fd4(gp)
0x0049172c nop
0x00491730 addiu a0, a0, 0x3344 ; "echo %s > %s/%08X"
0x00491734 lw a1, (EncryptKey_param) ; Attacker controlled string
0x00491738 lw a2, -0x7fd4(gp)
0x0049173c nop
0x00491740 addiu a2, a2, 0x3330 ; 0x583330 ; "/tmp/.encryptkey/"
0x00491744 lw a3, -0x7fe8(gp)
0x00491748 nop
0x0049174c addiu a3, a3, -0xf10
0x00491750 lw a3, (a3)
0x00491754 lw t9, -sym.cmCommand(gp)
0x00491758 nop
0x0049175c jalr t9

Remediation:
Install firmware updates provided by the vendor to fix the vulnerability.
The latest updates can be found at the following URLs:

https://www.tp-link.com/en/support/download/nc200/#Firmware
https://www.tp-link.com/en/support/download/nc210/#Firmware
https://www.tp-link.com/en/support/download/nc220/#Firmware
https://www.tp-link.com/en/support/download/nc230/#Firmware
https://www.tp-link.com/en/support/download/nc250/#Firmware
https://www.tp-link.com/en/support/download/nc260/#Firmware
https://www.tp-link.com/en/support/download/nc450/#Firmware

Disclosure timeline:
29th March 2020 - Vulnerability reported to vendor.
27th April 2020 - Patched firmware provided by vendor for verification.
27th April 2020 - Confirmed the vulnerability was fixed.
29th April 2020 - Firmware updates released to the public.
29th April 2020 - Vulnerability details are made public.


Login or Register to add favorites

File Archive:

October 2020

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Oct 1st
    25 Files
  • 2
    Oct 2nd
    13 Files
  • 3
    Oct 3rd
    1 Files
  • 4
    Oct 4th
    1 Files
  • 5
    Oct 5th
    15 Files
  • 6
    Oct 6th
    15 Files
  • 7
    Oct 7th
    15 Files
  • 8
    Oct 8th
    11 Files
  • 9
    Oct 9th
    3 Files
  • 10
    Oct 10th
    1 Files
  • 11
    Oct 11th
    1 Files
  • 12
    Oct 12th
    8 Files
  • 13
    Oct 13th
    12 Files
  • 14
    Oct 14th
    23 Files
  • 15
    Oct 15th
    4 Files
  • 16
    Oct 16th
    13 Files
  • 17
    Oct 17th
    1 Files
  • 18
    Oct 18th
    1 Files
  • 19
    Oct 19th
    27 Files
  • 20
    Oct 20th
    41 Files
  • 21
    Oct 21st
    18 Files
  • 22
    Oct 22nd
    16 Files
  • 23
    Oct 23rd
    2 Files
  • 24
    Oct 24th
    0 Files
  • 25
    Oct 25th
    0 Files
  • 26
    Oct 26th
    0 Files
  • 27
    Oct 27th
    0 Files
  • 28
    Oct 28th
    0 Files
  • 29
    Oct 29th
    0 Files
  • 30
    Oct 30th
    0 Files
  • 31
    Oct 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2020 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close