CVE-2023-42115

CRITICAL

Exim < 4.96.1 - Out-of-Bounds Write

Title source: rule

Description

Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17434.

Exploits (3)

nomisec WORKING POC 8 stars
by kirinse · poc
https://github.com/kirinse/cve-2023-42115
nomisec WORKING POC
by doaso · poc
https://github.com/doaso/CVE-2023-42115
inthewild WORKING POC
poc
https://github.com/isotaka134/cve-2023-42115

Scores

CVSS v3 9.8
EPSS 0.7069
EPSS Percentile 98.7%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (1)
exim/exim < 4.96.1
Published May 03, 2024
Tracked Since Feb 18, 2026