CVE-2023-42116: (0Day) Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability
First published: Thu Sep 28 2023(Updated: )
[Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability]
Credit: zdi-disclosures@trendmicro.com zdi-disclosures@trendmicro.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Exim Exim | ||
| ubuntu/exim4 | <4.90.1-1ubuntu1.10+ | 4.90.1-1ubuntu1.10+ |
| ubuntu/exim4 | <4.93-13ubuntu1.8 | 4.93-13ubuntu1.8 |
| ubuntu/exim4 | <4.95-4ubuntu2.3 | 4.95-4ubuntu2.3 |
| ubuntu/exim4 | <4.96-14ubuntu1.2 | 4.96-14ubuntu1.2 |
| ubuntu/exim4 | <4.96-17ubuntu2 | 4.96-17ubuntu2 |
| ubuntu/exim4 | <4.82-3ubuntu2.4+ | 4.82-3ubuntu2.4+ |
| ubuntu/exim4 | <4.96.1 | 4.96.1 |
| ubuntu/exim4 | <4.86.2-2ubuntu2.6+ | 4.86.2-2ubuntu2.6+ |
| debian/exim4 | <=4.92-8+deb10u6 | 4.92-8+deb10u9 4.94.2-7+deb11u2 4.96-15+deb12u4 4.97-8 |
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Reference Links
- https://www.zerodayinitiative.com/advisories/ZDI-23-1470/
- https://bugs.exim.org/show_bug.cgi?id=3000
- https://git.exim.org/exim.git/log/refs/heads/exim-4.96%20security/exim.git/commit/936e342d560e218c2aee5cb2295be925c27c2106
- https://www.openwall.com/lists/oss-security/2023/09/29/5
- https://www.openwall.com/lists/oss-security/2023/10/01/4
- https://exim.org/static/doc/security/CVE-2023-zdi.txt
- https://security-tracker.debian.org/tracker/CVE-2023-42116
- https://www.openwall.com/lists/oss-security/2023/10/02/3
- https://ubuntu.com/security/notices/USN-6411-1
- https://www.cve.org/CVERecord?id=CVE-2023-42116
- https://nvd.nist.gov/vuln/detail/CVE-2023-42116
- https://launchpad.net/bugs/cve/CVE-2023-42116
- https://ubuntu.com/security/CVE-2023-42116
Frequently Asked Questions
What is CVE-2023-42116?
CVE-2023-42116 is a vulnerability that allows remote attackers to execute arbitrary code on affected installations of Exim.
Is authentication required to exploit CVE-2023-42116?
No, authentication is not required to exploit this vulnerability.
What is the severity of CVE-2023-42116?
CVE-2023-42116 has a severity rating of 8.1 (high).
Which versions of Exim are affected by CVE-2023-42116?
Versions 4.90.1-1ubuntu1.10+ to 4.96.1 of Exim are affected by CVE-2023-42116.
How do I fix CVE-2023-42116?
To fix CVE-2023-42116, update your Exim installation to version 4.90.1-1ubuntu1.10+ or higher.
- agent/type
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