VulnerabilityModified
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.
CRITICAL 9.8EPSS 3.82%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.82%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.82% probability · 89th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- exim/exim · debian/debian linux
- Source
- cve@mitre.org
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.