CVE-2020-28018
Exim OpenSSL Use After Free Vulnerability
Description
Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL.
INFO
Published Date :
May 6, 2021, 1:15 p.m.
Last Modified :
May 26, 2021, 7:34 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-28018 has a 10 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-2020-28018.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2021/05/11/14 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2021/05/11/15 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2021/05/11/17 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2021/05/11/5 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2021/05/11/6 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2021/05/12/2 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2021/05/12/3 | Mailing List Third Party Advisory |
| https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.txt | Vendor Advisory |
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).
Imoro Umar Farouq's report on Internal Network Penetration Testing
Shell
bounty collection
Shell Python Dockerfile Ruby JavaScript ASP.NET Classic ASP HTML PHP Jupyter Notebook
None
None
None
Dockerfile Makefile Go
CVE Exploit PoC's
C Makefile Shell M4 Roff Perl Yacc Lex Pascal Python
Exploit for Exim4 4.93 CVE-2020-28018
Makefile Roff Shell C Perl
exim use after free exploit and detection
Python Makefile C
Speech slides
PoC exploits for software vulnerabilities
C Makefile Shell M4 Roff Perl Yacc Lex Pascal Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-28018 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-28018 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 [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
May. 26, 2021
Action Type Old Value New Value Changed Reference Type http://www.openwall.com/lists/oss-security/2021/05/11/14 No Types Assigned http://www.openwall.com/lists/oss-security/2021/05/11/14 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2021/05/11/15 No Types Assigned http://www.openwall.com/lists/oss-security/2021/05/11/15 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2021/05/11/17 No Types Assigned http://www.openwall.com/lists/oss-security/2021/05/11/17 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2021/05/11/5 No Types Assigned http://www.openwall.com/lists/oss-security/2021/05/11/5 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2021/05/11/6 No Types Assigned http://www.openwall.com/lists/oss-security/2021/05/11/6 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2021/05/12/2 No Types Assigned http://www.openwall.com/lists/oss-security/2021/05/12/2 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2021/05/12/3 No Types Assigned http://www.openwall.com/lists/oss-security/2021/05/12/3 Mailing List, Third Party Advisory -
CVE Modified by [email protected]
May. 13, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/05/12/3 [No Types Assigned] -
CVE Modified by [email protected]
May. 12, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/05/12/2 [No Types Assigned] -
CVE Modified by [email protected]
May. 12, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/05/11/17 [No Types Assigned] Added Reference http://www.openwall.com/lists/oss-security/2021/05/11/15 [No Types Assigned] Added Reference http://www.openwall.com/lists/oss-security/2021/05/11/14 [No Types Assigned] -
CVE Modified by [email protected]
May. 11, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/05/11/5 [No Types Assigned] Added Reference http://www.openwall.com/lists/oss-security/2021/05/11/6 [No Types Assigned] -
Initial Analysis by [email protected]
May. 10, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.txt No Types Assigned https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.txt Vendor Advisory Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:* versions from (including) 4.90 up to (excluding) 4.94.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-28018 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-2020-28018
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
3.34 }} 0.19%
score
0.90439
percentile