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VULNERABILITIES

CVE-2021-44273 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.4 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2 CVEPatchThird Party Advisory
https://github.com/e2guardian/e2guardian/issues/707 CVEExploitIssue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html CVE
http://www.openwall.com/lists/oss-security/2021/12/23/2 CVEMailing ListThird Party Advisory
https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2 [email protected]PatchThird Party Advisory

see all 8 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-295Improper Certificate Validation[email protected]

Affected Products

ProductVersions
e2bn e2guardian
>= 5.4.0, <= 5.4.3r

CPE

  • cpe:2.3:a:e2bn:e2guardian:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-44273
NVD Published Date:
Dec 23, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-44273 Details - Not Deferred