CVE-2021-44273 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Reference

https://github.com/e2guardian/e2guardian/issues/707 https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2 http://www.openwall.com/lists/oss-security/2021/12/23/2

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.4