Vulnerability Details CVE-2021-44273
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 45.9%
CVSS Severity
CVSS v3 Score 7.4
CVSS v2 Score 5.8
References
- http://www.openwall.com/lists/oss-security/2021/12/23/2
- https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2
- https://github.com/e2guardian/e2guardian/issues/707
- https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html
- http://www.openwall.com/lists/oss-security/2021/12/23/2
- https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2
- https://github.com/e2guardian/e2guardian/issues/707
- https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html
Products affected by CVE-2021-44273
-
cpe:2.3:a:e2bn:e2guardian:*