#VU66691 Heap-based buffer overflow in Exim - CVE-2022-37452
Published: August 22, 2022
Vulnerability identifier: #VU66691
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2022-37452
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Exim
Exim
Software vendor:
Exim
Exim
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error for the alias list within the host_name_lookup() function in host.c when the sender_host_name is set. A remote attacker can initiate a connection to the affected server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.
External links
- https://www.exim.org/static/doc/security/
- https://github.com/ivd38/exim_overflow
- https://www.openwall.com/lists/oss-security/2022/08/06/8
- https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743
- https://github.com/Exim/exim/wiki/EximSecurity
- https://github.com/Exim/exim/compare/exim-4.94...exim-4.95