Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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.

Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 2 products from exim, from debian organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2022-08-07T18:15:08.343

Last Modified

2024-11-21T07:15:00.573

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	exim	exim	< 4.95	Yes
Operating System	debian	debian_linux	10.0	Yes

References

https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743 Patch, Third Party Advisory ([email protected])
https://github.com/Exim/exim/compare/exim-4.94...exim-4.95 Patch, Release Notes, Third Party Advisory ([email protected])
https://github.com/Exim/exim/wiki/EximSecurity Release Notes, Third Party Advisory ([email protected])
https://github.com/ivd38/exim_overflow Exploit, Patch, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2022/08/msg00014.html Mailing List, Third Party Advisory ([email protected])
https://www.exim.org/static/doc/security/ Vendor Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2022/08/06/8 Mailing List, Third Party Advisory ([email protected])
https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/Exim/exim/compare/exim-4.94...exim-4.95 Patch, Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/Exim/exim/wiki/EximSecurity Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/ivd38/exim_overflow Exploit, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2022/08/msg00014.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.exim.org/static/doc/security/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2022/08/06/8 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For exim's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.