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 severity · published Aug 7, 2022

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

9.8

CVSS

3.8%

EPSS

On KEV

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 vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)3.8% · higher than 90% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Debian Linux · Debian

10.0 · source: NVD

Exim · Exim

before 4.95 · source: NVD

Affected product

Debian Linux

Debian

All Debian Linux CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2022-37452

CVE.org

https://www.cve.org/CVERecord?id=CVE-2022-37452

Patch

https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743

Patch

https://github.com/Exim/exim/compare/exim-4.94...exim-4.95

Release Notes

https://github.com/Exim/exim/wiki/EximSecurity

Exploit

https://github.com/ivd38/exim_overflow

Mailing List

https://lists.debian.org/debian-lts-announce/2022/08/msg00014.html

Vendor Advisory

https://www.exim.org/static/doc/security/