CVE-2021-44273

Public Exploit

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.

Category

7.4
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.19%
Third-Party Advisory openwall.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/e2guardian/e2guardian/issues/707 patch exploit third party advisory issue tracking
https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2 third party advisory patch
http://www.openwall.com/lists/oss-security/2021/12/23/2 third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html mailing list

Frequently Asked Questions

What is the severity of CVE-2021-44273?
CVE-2021-44273 has been scored as a high severity vulnerability.
How to fix CVE-2021-44273?
To fix CVE-2021-44273, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-44273 being actively exploited in the wild?
It is possible that CVE-2021-44273 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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