ZDI-23-1469: (0Day) Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability
First published: Wed Sep 27 2023(Updated: )
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account.
| Affected Software | Affected Version | How to fix |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is ZDI-23-1469.
What software is affected by this vulnerability?
The Exim software is affected by this vulnerability.
Is authentication required to exploit this vulnerability?
No, authentication is not required to exploit this vulnerability.
What is the severity of this vulnerability?
The severity of this vulnerability is critical with a CVSS score of 9.8.
How can I fix this vulnerability?
To fix this vulnerability, update to the latest version of Exim.
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