ZDI-CAN-17643: ZDI-23-1473: (0Day) Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability
First published: Wed Sep 27 2023(Updated: )
This vulnerability allows network-adjacent attackers to disclose sensitive information 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 read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account.
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this Exim vulnerability?
The vulnerability ID of this Exim vulnerability is ZDI-CAN-17643.
What is the severity of ZDI-CAN-17643?
The severity of ZDI-CAN-17643 is low with a severity value of 3.1.
How can a network-adjacent attacker exploit ZDI-CAN-17643?
A network-adjacent attacker can exploit ZDI-CAN-17643 to disclose sensitive information on affected installations of Exim without requiring authentication.
What is the affected software for ZDI-CAN-17643?
The affected software for ZDI-CAN-17643 is Exim.
Where can I find more information about ZDI-CAN-17643?
You can find more information about ZDI-CAN-17643 at the Zero Day Initiative advisory page: http://www.zerodayinitiative.com/advisories/ZDI-23-1473/
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