CVE-2022-37452
CRITICALCVSS 9.8/10EPSS 2.92%
Last modified
CVE-2022-37452 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Exim before 4.95 has a heap-based buffer overflow for the alias list in host_name_lookup in host.c when sender_host_name is set.. EPSS estimates a 2.92% chance of exploitation in the next 30 days.
Description
Exim before 4.95 has a heap-based buffer overflow for the alias list in host_name_lookup in host.c when sender_host_name is set.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Exim | Exim | < 4.95 |
| Debian | Debian Linux | 10.0 |
References
- https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743Patch, Third Party Advisory
- https://github.com/Exim/exim/compare/exim-4.94...exim-4.95Patch, Release Notes, Third Party Advisory
- https://github.com/Exim/exim/wiki/EximSecurityRelease Notes, Third Party Advisory
- https://github.com/ivd38/exim_overflowExploit, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/08/msg00014.htmlMailing List, Third Party Advisory
- https://www.exim.org/static/doc/security/Vendor Advisory
- https://www.openwall.com/lists/oss-security/2022/08/06/8Mailing List, Third Party Advisory
- https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743Patch, Third Party Advisory
- https://github.com/Exim/exim/compare/exim-4.94...exim-4.95Patch, Release Notes, Third Party Advisory
- https://github.com/Exim/exim/wiki/EximSecurityRelease Notes, Third Party Advisory
- https://github.com/ivd38/exim_overflowExploit, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/08/msg00014.htmlMailing List, Third Party Advisory
- https://www.exim.org/static/doc/security/Vendor Advisory
- https://www.openwall.com/lists/oss-security/2022/08/06/8Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2022-37452?
Exim before 4.95 has a heap-based buffer overflow for the alias list in host_name_lookup in host.c when sender_host_name is set.
How severe is CVE-2022-37452?
CVE-2022-37452 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.92% probability of exploitation in the next 30 days.
How do I fix CVE-2022-37452?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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