What is the vulnerability ID for this Exim vulnerability?

The vulnerability ID for this Exim vulnerability is ZDI-CAN-17515.

What is the severity of ZDI-CAN-17515?

The severity of ZDI-CAN-17515 is high with a severity value of 8.1.

Where can I find more information about this vulnerability?

You can find more information about this vulnerability at http://www.zerodayinitiative.com/advisories/ZDI-23-1470/ and https://www.zerodayinitiative.com/advisories/ZDI-23-1470/.

Vulnerability/
ZDI-CAN-17515

high

8.1

27/9/2023

16/1/2024

ZDI-CAN-17515: 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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Frequently Asked Questions

What is the vulnerability ID for this Exim vulnerability?
The vulnerability ID for this Exim vulnerability is ZDI-CAN-17515.
What is the severity of ZDI-CAN-17515?
The severity of ZDI-CAN-17515 is high with a severity value of 8.1.
How does this vulnerability allow attackers to execute arbitrary code?
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim.
Is authentication required to exploit this vulnerability?
No, authentication is not required to exploit this vulnerability.
Where can I find more information about this vulnerability?
You can find more information about this vulnerability at http://www.zerodayinitiative.com/advisories/ZDI-23-1470/ and https://www.zerodayinitiative.com/advisories/ZDI-23-1470/.

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alias/CVE-2023-42116
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agent/references
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vendor/exim
canonical/exim exim

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