CVE-2020-29238

EPSS 16.4%

Vexday Risk Score

28Low

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS —EPSS 16.4%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

10 Mar 2021Published on NVD

13 Apr 2021Public PoC

Weaponization speed

34 daysto first PoC

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

Affected products

n/a · n/a

public PoCs found — 2

exploitdbwww.exploit-db.com/exploits/49760unverified cve_referencepacketstormsecurity.com/files/162152/ExpressVPN-VPN-Router-1.0-Integer-Overflow.htmlunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

http://ja1sharma.com/blog/2021/CVE-2020-29238/http://packetstormsecurity.com/files/162152/ExpressVPN-VPN-Router-1.0-Integer-Overflow.html 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