Vulnerability CVE-2020-29238
Published: 2021-03-10

Description:
An integer buffer overflow in the Nginx webserver of ExpressVPN Router version 1 allows remote attackers to obtain sensitive information when the server running as reverse proxy via specially crafted request.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
ExpressVPN VPN Router 1.0 Router Login Panels Integer Overflow
Jai Kumar Sharma
13.04.2021

Type:

CWE-190

 (Integer Overflow or Wraparound)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Expressvpn -> Expressvpn 

 References:
http://expressvpn.com
http://ja1sharma.com/blog/2021/CVE-2020-29238/
https://bugcrowd.com/disclosures/4e8d5325-8e49-4ea3-962a-a088bbb73a3f/expressvpn-router-integer-buffer-overflow-server-info-disclosure-when-router-s-nginx-server-used-as-reverse-proxy-server
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