CVE-2020-28018: Use After Free
First published: Thu May 06 2021(Updated: )
Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Exim Exim | >=4.90<4.94.2 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2021/05/11/14
- http://www.openwall.com/lists/oss-security/2021/05/11/15
- http://www.openwall.com/lists/oss-security/2021/05/11/17
- http://www.openwall.com/lists/oss-security/2021/05/11/5
- http://www.openwall.com/lists/oss-security/2021/05/11/6
- http://www.openwall.com/lists/oss-security/2021/05/12/2
- http://www.openwall.com/lists/oss-security/2021/05/12/3
- https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.txt
Frequently Asked Questions
What is CVE-2020-28018?
CVE-2020-28018 is a vulnerability in Exim 4 before 4.94.2 that allows Use After Free in smtp_reset in certain situations.
What is the severity of CVE-2020-28018?
CVE-2020-28018 has a severity rating of critical with a score of 9.8.
How does CVE-2020-28018 affect Exim?
CVE-2020-28018 affects Exim versions between 4.90 and 4.94.2.
How can I fix CVE-2020-28018?
To fix CVE-2020-28018, update Exim to version 4.94.2 or later.
What is CWE-416?
CWE-416 refers to Use After Free vulnerabilities, which is the type of vulnerability present in CVE-2020-28018.
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