CVE-2021-44273
e2guardian SSL MITM Hostname Certificate Validation Vulnerability
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.
INFO
Published Date :
Dec. 23, 2021, 12:15 p.m.
Last Modified :
Nov. 21, 2024, 6:30 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
2.2
Public PoC/Exploit Available at Github
CVE-2021-44273 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-44273.
| URL | Resource |
|---|---|
| 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 | |
| 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-44273 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-44273 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/12/23/2 Added Reference https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2 Added Reference https://github.com/e2guardian/e2guardian/issues/707 Added Reference https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Sep. 13, 2023
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2023/09/msg00010.html [No Types Assigned] -
Initial Analysis by [email protected]
Jan. 11, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Changed Reference Type http://www.openwall.com/lists/oss-security/2021/12/23/2 No Types Assigned http://www.openwall.com/lists/oss-security/2021/12/23/2 Mailing List, Third Party Advisory Changed Reference Type https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2 No Types Assigned https://github.com/e2guardian/e2guardian/commit/eae46a7e2a57103aadca903c4a24cca94dc502a2 Patch, Third Party Advisory Changed Reference Type https://github.com/e2guardian/e2guardian/issues/707 No Types Assigned https://github.com/e2guardian/e2guardian/issues/707 Exploit, Issue Tracking, Patch, Third Party Advisory Added CWE NIST CWE-295 Added CPE Configuration OR *cpe:2.3:a:e2bn:e2guardian:*:*:*:*:*:*:*:* versions from (including) 5.4.0 up to (including) 5.4.3r -
CVE Modified by [email protected]
Dec. 23, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/12/23/2 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-44273 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-44273
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.23 }} 0.01%
score
0.45892
percentile