CVE-2022-33738 — OpenVPN Access Server before 2

OpenVPN Access Server before 2.11 uses a weak random generator used to create user session token for the web portal

01What is this vulnerability?

OpenVPN Access Server before 2.11 uses a weak random generator used to create user session token for the web portal

02Affected products

Vendor	Product	Versions
n	a / OpenVPN Access Server	until 2.11

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-07-06T15:10:33.000Z
• Last modified: 2024-08-03T08:09:22.611Z

09References

• openvpn.net — https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-…