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.
| Affected Software | Affected Version | How to fix |
|---|---|---|
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Exim vulnerability?
The vulnerability ID for this Exim vulnerability is ZDI-23-1473.
What is the severity of the ZDI-23-1473 vulnerability?
The severity of the ZDI-23-1473 vulnerability is low with a severity value of 3.1.
How can this vulnerability be exploited?
This vulnerability can be exploited by network-adjacent attackers to disclose sensitive information on affected installations of Exim without requiring authentication.
What is the affected software for the ZDI-23-1473 vulnerability?
The affected software for the ZDI-23-1473 vulnerability is Exim.
Where can I find more information about the ZDI-23-1473 vulnerability?
More information about the ZDI-23-1473 vulnerability can be found at the following references: [ZDI-23-1473 Advisory](http://www.zerodayinitiative.com/advisories/ZDI-23-1473/) and [ZDI-23-1473 Advisory](https://www.zerodayinitiative.com/advisories/ZDI-23-1473/)
- collector/zdi-published
- alias/ZDI-CAN-17643
- agent/first-publish-date
- agent/last-modified-date
- agent/softwarecombine
- agent/type
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-23-1473
- alias/CVE-2023-42119
- agent/software-canonical-lookup
- agent/title
- agent/severity
- agent/references
- agent/tags
- agent/description
- agent/event
- agent/trending
- vendor/exim
- canonical/exim exim