Permissions, Privileges, and Access Controls in ConnectPort X2e - CVE-2020-12878
Published: February 18, 2021
Vulnerability identifier: #VU50808
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-12878
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Digi International Inc.
Affected software:
ConnectPort X2e
ConnectPort X2e
Detailed vulnerability description
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions. A remote authenticated attacker can escalate privileges from the python user to root via a symlink attack that uses chown, related to /etc/init.d/S50dropbear.sh and the /WEB/python/.ssh directory.
How to mitigate CVE-2020-12878
Install updates from vendor's website.
Sources
- https://github.com/fireeye/Vulnerability-Disclosures
- https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2020-0020/FEYE-2020-0020.md
- https://www.digi.com/support/productdetail?pid=5570
- https://www.fireeye.com/blog/threat-research/2021/02/solarcity-exploitation-of-x2e-iot-device-part-one.html
- https://www.fireeye.com/blog/threat-research/2021/02/solarcity-exploitation-of-x2e-iot-device-part-two.html