CVE-2021-38371
First published: Tue Aug 10 2021(Updated: )
The STARTTLS feature in Exim through 4.94.2 allows response injection (buffering) during MTA SMTP sending.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Exim Exim | <=4.94.2 | |
| ubuntu/exim4 | <4.90.1-1ubuntu1.10+ | 4.90.1-1ubuntu1.10+ |
| ubuntu/exim4 | <4.93-13ubuntu1.11 | 4.93-13ubuntu1.11 |
| ubuntu/exim4 | <4.82-3ubuntu2.4+ | 4.82-3ubuntu2.4+ |
| ubuntu/exim4 | <4.95 | 4.95 |
| ubuntu/exim4 | <4.86.2-2ubuntu2.6+ | 4.86.2-2ubuntu2.6+ |
| debian/exim4 | <=4.94.2-7+deb11u3 | 4.96-15+deb12u5 4.98-1 |
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Reference Links
- https://nostarttls.secvuln.info
- https://www.exim.org
- https://www.exim.org/static/doc/security/CVE-2021-38371.txt
- https://launchpad.net/bugs/cve/CVE-2021-38371
- https://security-tracker.debian.org/tracker/CVE-2021-38371
- https://www.cve.org/CVERecord?id=CVE-2021-38371
- https://ubuntu.com/security/notices/USN-6881-1
- https://nvd.nist.gov/vuln/detail/CVE-2021-38371
- https://git.exim.org/exim.git/commit/1b9ab35f323121aabf029f0496c7227818efad14
- https://ubuntu.com/security/CVE-2021-38371
Frequently Asked Questions
What is CVE-2021-38371?
CVE-2021-38371 is a vulnerability in Exim, a popular mail transfer agent software, that allows response injection (buffering) during MTA SMTP sending.
What is the severity of CVE-2021-38371?
CVE-2021-38371 has a high severity with a CVSS score of 7.5.
How does CVE-2021-38371 affect Exim?
CVE-2021-38371 affects Exim versions up to and including 4.94.2, exposing them to response injection (buffering) during MTA SMTP sending.
How can I fix CVE-2021-38371?
To fix CVE-2021-38371, users are advised to update their Exim software to version 4.94.3 or later, which includes a patch for this vulnerability.
Where can I find more information about CVE-2021-38371?
More information about CVE-2021-38371 can be found on the official Exim website and the CVE-2021-38371.txt security advisory.
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