PT-2022-3996 · Exim+4 · Exim+4

Evgeny Legerov · Published 2022-08-07 · Updated 2023-08-25 · CVE-2022-37452

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.95

Description The issue is related to a heap-based buffer overflow in the host name lookup function in host.c when sender host name is set. This can potentially allow a remote attacker to impact the confidentiality, integrity, and availability of protected information.

Recommendations For versions prior to 4.95, update to version 4.95 or later to resolve the issue. As a temporary workaround, consider restricting the use of the sender host name setting until a patch is available.

Exploit

Fix

Memory Corruption

Heap Based Buffer Overflow

Weakness Enumeration

CWE-787

CWE-122

Related Identifiers

ALT-PU-2023-4105

ALT-PU-2023-4919

ALT-PU-2023-4920

ALT-PU-2023-5120

BDU:2022-04829

CVE-2022-37452

DLA-3082-1

USN-5574-1

Affected Products

Alt Linux

Astra Linux

Exim

Linuxmint

Ubuntu

References · 29

• 🔥❌ https://github.com/ivd38/exim_overflow · Exploit, Deleted
• https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743 · Patch
• https://github.com/Exim/exim/compare/exim-4.94...exim-4.95 · Patch
• https://osv.dev/vulnerability/DLA-3082-1 · Vendor Advisory
• https://exim.org/static/doc/security · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se47-bulletin-2022-1121SE47 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-37452 · Security Note
• https://cve.org/CVERecord?id=CVE-2022-37452 · Security Note
• https://osv.dev/vulnerability/CVE-2022-37452 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-37452 · Vendor Advisory
• http://repo.red-soft.ru/redos/7.3c/x86_64/updates · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se16-bulletin-20231214SE16 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-37452 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2022-1110SE17 · Vendor Advisory