Khalil Shreateh specializes in cybersecurity, particularly as a "white hat" hacker. He focuses on identifying and reporting security vulnerabilities in software and online platforms, with notable expertise in web application security. His most prominent work includes discovering a critical flaw in Facebook's system in 2013. Additionally, he develops free social media tools and browser extensions, contributing to digital security and user accessibility.

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Exim 4.98 SQL Injection

Details
Written by: khalil shreateh
Category: Vulnerabilities
Hits: 102
# CVE 2025-26794

- Sat, 08 Feb 2025 21:14:37 +0100: reported
# CVE 2025-26794

- Sat, 08 Feb 2025 21:14:37 +0100: reported
- by: "Oscar Bataille" <This email address is being protected from spambots. You need JavaScript enabled to view it.>
- to: This email address is being protected from spambots. You need JavaScript enabled to view it.
- Sun, 9 Feb 2025 00:00:05 +0100: report confirmed
- Tue, 11 Feb 2025 00:23:34 +0100: issue confirmed
- Tue, 11 Feb 2025 00:23:34 +0100: issue confirmed
- Tue, 11 Feb 2025 12:54:10 +0000: CVE ID requested
- Fri, 14 Feb 2025 04:19:13 -0500: CVE ID 2025-26794 received
- Tue, 18 Feb 2025 20:56:25 +0100: sent notification to <This email address is being protected from spambots. You need JavaScript enabled to view it.>
- Wed, 19 Feb 2025 23:07:02 +0100: sent notification to <This email address is being protected from spambots. You need JavaScript enabled to view it.>, and <This email address is being protected from spambots. You need JavaScript enabled to view it.>
- Wed, 19 Feb 2025 23:07:02 +0100: sent notification to <This email address is being protected from spambots. You need JavaScript enabled to view it.>, and <This email address is being protected from spambots. You need JavaScript enabled to view it.>
- Thu, 20 Feb 2025 18:36:34 +0100: sent notification to <This email address is being protected from spambots. You need JavaScript enabled to view it.>
- Fri, 21 Feb 2025 13:00:00 +0100: published the changes on https://code.exim.org/exim/exim.git


## Details

A SQL injection is possible.

The following conditions have to be met for being vulnerable:

- Exim Version 4.98
- Build time option _USE_SQLITE_ is set (it enables the use of SQLite
for the hints databases) -- check the output of `exim -bV`, whether it
contains
```
Hints DB:
Using sqlite3
```
- Runtime config enables ETRN (`acl_smtp_etrn` returns _accept_
(defaults to _deny_))
- Runtime config enforces ETRN serialization (`smtp_etrn_serialize` is
set to _true_ (defaults to _true_))

## Acknowledgements

Thanks to Oscar Bataille for discovering and reporting this issue in a
responsible manner.
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