Integer overflow in Expressvpn
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 class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.165 (96.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.165 · newest: 0.165 · change: 0.000
Affected products
- Expressvpn — versions 1.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)
- bugcrowd.com/disclosures/4e8d5325-8e49-4ea3-962a-a088bbb73a3f/expressvpn-router… (Third Party Advisory)
- ja1sharma.com/blog/2021/CVE-2020-29238/ (Third Party Advisory)
- packetstormsecurity.com/files/162152/ExpressVPN-VPN-Router-1.0-Integer-Overflow… (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-29238?
- CVE-2020-29238 is a high-severity vulnerability in Expressvpn, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2021-03-10.
- How severe is CVE-2020-29238?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-29238 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.