Barco wePresent WiPG-1600W versions 2.5.1.8, 2.5.0.25, 2.5.0.24, and 2.4.1.19 have a hardcoded root password hash included in the firmware image.
f546a4da12e5bb23b7138a0af23f3ff1KL-001-2020-008 : Barco wePresent Global Hardcoded Root SSH Password
Title: Barco wePresent Global Hardcoded Root SSH Password
Advisory ID: KL-001-2020-008
Publication Date: 2020.11.20
Publication URL: https://korelogic.com/Resources/Advisories/KL-001-2020-008.txt
1. Vulnerability Details
Affected Vendor: Barco
Affected Product: wePresent WiPG-1600W
Affected Version: 2.5.1.8, 2.5.0.25, 2.5.0.24, 2.4.1.19
Platform: Embedded Linux
CWE Classification: CWE-798: Use of Hard-coded Credentials
CVE ID: CVE-2020-28334
2. Vulnerability Description
The Barco wePresent device has a hardcoded root password hash
included in the firmware image. To our knowledge the password
hash has not been cracked and published; it is possible this
could occur at any time. This combined with KL-001-2020-004
(CVE-2020-28329), KL-001-2020-005 (CVE-2020-28330), and
KL-001-2020-007 (CVE-2020-28331) could be used in a simple
and automated exploit chain to go from unauthenticated remote
attacker to root shell.
3. Technical Description
In looking at the unpacked firmware, a root hash was quickly
identified in the /etc/shadow file on the device. It is the
only account in the /etc/shadow. The device does not prompt
the administrator to set a new root password, therefore this
password is hardcoded and exists across all devices.
4. Mitigation and Remediation Recommendation
The vendor has released an updated firmware (2.5.3.12) which
remediates the described vulnerability. Firmware and release
notes are available at:
https://www.barco.com/en/support/software/R33050104
5. Credit
This vulnerability was discovered by Jim Becher (@jimbecher) of
KoreLogic, Inc.
6. Disclosure Timeline
2020.08.24 - KoreLogic submits vulnerability details to
Barco.
2020.08.25 - Barco acknowledges receipt and the intention
to investigate.
2020.09.21 - Barco notifies KoreLogic that this issue,
along with several others reported by KoreLogic,
will require more than the standard 45 business
day remediation timeline. Barco requests to delay
coordinated disclosure until 2020.12.11.
2020.09.23 - KoreLogic agrees to 2020.12.11 coordinated disclosure.
2020.09.25 - Barco informs KoreLogic of their intent to acquire
CVE number for this vulnerability.
2020.11.09 - Barco shares CVE number with KoreLogic and announces
their intention to release the updated firmware
ahead of schedule, on 2020.11.11. Request that KoreLogic
delay public disclosure until 2020.11.20.
2020.11.11 - Barco firmware release.
2020.11.20 - KoreLogic public disclosure.
7. Proof of Concept
After unpacking the firmware:
$ ls -al etc/shadow
-rwxr-xr-x 1 user user 59 May 25 00:11 etc/shadow
$ cat etc/shadow
root:$1$reqE8o6b$[REDACTED]:12940:0:99999:7:::
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KoreLogic, Inc. and are licensed under a Creative Commons
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