CVE-2022-37452
9.8
CRITICAL · CVSS 3.1 · EPSS 3.8% (pctl 90)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.81% — more likely to be exploited than 90% of all CVEs |
| Weakness | CWE-787 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2022-08-07 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| debian | debian linux |
| exim | exim |
References
- https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743
- https://github.com/Exim/exim/compare/exim-4.94...exim-4.95
- https://github.com/Exim/exim/wiki/EximSecurity
- https://github.com/ivd38/exim_overflow
- https://lists.debian.org/debian-lts-announce/2022/08/msg00014.html
- https://www.exim.org/static/doc/security/
- https://www.openwall.com/lists/oss-security/2022/08/06/8
- https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743
- https://github.com/Exim/exim/compare/exim-4.94...exim-4.95
- https://github.com/Exim/exim/wiki/EximSecurity
- https://github.com/ivd38/exim_overflow
- https://lists.debian.org/debian-lts-announce/2022/08/msg00014.html
- https://www.exim.org/static/doc/security/
- https://www.openwall.com/lists/oss-security/2022/08/06/8
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