CVEvulnerability
CVE-2021-44273
7.4 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-12-23
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:N
- Weaknesses
- CWE-295
Description
e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine. In standalone mode (i.e., acting as a proxy or a transparent proxy), with SSL MITM enabled, e2guardian, if built with OpenSSL v1.1.x, did not validate hostnames in certificates of the web servers that it connected to, and thus was itself vulnerable to MITM attacks.
Affected configurations
• e2bn e2guardian (>= 5.4.0 <= 5.4.3r)
Related
Weakness · CWE (1)
- CWE-295 Improper Certificate Validation weakness
References
- http://www.openwall.com/lists/oss-security/2021/12/23/2 Mailing List, Third Party Advisory
- https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2 Patch, Third Party Advisory
- https://github.com/e2guardian/e2guardian/issues/707 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html lists.debian.org
- http://www.openwall.com/lists/oss-security/2021/12/23/2 Mailing List, Third Party Advisory
- https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2 Patch, Third Party Advisory
- https://github.com/e2guardian/e2guardian/issues/707 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html lists.debian.org