CVE-2020-28020: Integer Overflow
First published: Thu May 06 2021(Updated: )
Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation lines during header-length restriction.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Exim Exim | >=4.00<4.92 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-28020?
CVE-2020-28020 is a vulnerability in Exim 4 before 4.92 that allows an unauthenticated remote attacker to execute arbitrary code by exploiting an integer overflow to buffer overflow.
How severe is CVE-2020-28020?
CVE-2020-28020 has a severity score of 9.8, which is considered critical.
What software is affected by CVE-2020-28020?
Exim version 4 before 4.92 is affected by CVE-2020-28020.
How can an attacker exploit CVE-2020-28020?
An attacker can exploit CVE-2020-28020 by leveraging the mishandling of continuation lines during header-length restriction.
Are there any references for CVE-2020-28020?
Yes, you can find references for CVE-2020-28020 at the following links: [Reference 1](http://www.openwall.com/lists/oss-security/2021/07/25/1), [Reference 2](http://www.openwall.com/lists/oss-security/2021/08/03/1), [Reference 3](https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28020-HSIZE.txt).
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