#VU81255 Integer underflow in Exim - CVE-2023-42118

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Main Vulnerability Database Vulnerabilities #VU81255

#VU81255 Integer underflow in Exim - CVE-2023-42118

Published: September 28, 2023 / Updated: October 1, 2023


Vulnerability identifier: #VU81255
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red
CVE-ID: CVE-2023-42118
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Exim
Software vendor:
Exim

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer underflow in libspf2 when parsing SPF macros. A remote attacker can pass specially crafted data to the server, trigger an integer underflow and execute arbitrary code on the target system.



Remediation

Install update from vendor's website.

External links