ZDI-23-1470: (0Day) Exim SMTP Challenge Stack-based Buffer Overflow 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 handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based 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 for this vulnerability?
The vulnerability ID for this vulnerability is ZDI-23-1470.
What is the severity of this vulnerability?
The severity of this vulnerability is high with a score of 8.1.
Which software is affected by this vulnerability?
This vulnerability affects Exim SMTP.
Is authentication required to exploit this vulnerability?
No, authentication is not required to exploit this vulnerability.
Is there a fix available for this vulnerability?
Yes, there are patches available to fix this vulnerability. Please refer to the vendor's website for more information.
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