Vulnerability Details : CVE-2020-29238
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.
Vulnerability category: Overflow
Products affected by CVE-2020-29238
- cpe:2.3:a:expressvpn:expressvpn:1.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-29238
41.91%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 97 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-29238
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2020-29238
-
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-29238
-
http://packetstormsecurity.com/files/162152/ExpressVPN-VPN-Router-1.0-Integer-Overflow.html
ExpressVPN VPN Router 1.0 Integer Overflow ≈ Packet StormThird Party Advisory;VDB Entry
-
http://expressvpn.com
High-Speed, Secure & Anonymous VPN Service | ExpressVPNVendor Advisory
-
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
Your Elastic Security Team, better security testing through bug bounties and managed security programs | BugcrowdThird Party Advisory
-
http://ja1sharma.com/blog/2021/CVE-2020-29238/
An Offensive Manual Approach to XSS (Cross Site Scripting)Third Party Advisory
Jump to