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CVE-2023-42115

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202402-18
Posted Feb 19, 2024
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202402-18 - Multiple vulnerabilities have been discovered in Exim, the worst of which can lead to remote code execution. Versions greater than or equal to 4.97.1 are affected.

tags | advisory, remote, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2023-42114, CVE-2023-42115, CVE-2023-42116, CVE-2023-42117, CVE-2023-42119, CVE-2023-51766
SHA-256 | baabebed21673e40b564e5721f4a8c2ad8b2d62a34a694a4ab0c3fd9b9eddfdc
Ubuntu Security Notice USN-6411-1
Posted Oct 5, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6411-1 - It was discovered that Exim incorrectly handled certain challenge requests. A remote attacker could possibly use this issue to perform out-of-bounds reads, resulting in information leakage. It was discovered that Exim incorrectly handled validation of user-supplied data. A remote attacker could possibly use this issue to perform out-of-bounds writes, resulting in arbitrary code execution. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 23.04.

tags | advisory, remote, arbitrary, code execution
systems | linux, ubuntu
advisories | CVE-2023-42114, CVE-2023-42115, CVE-2023-42116
SHA-256 | 506117958a37b2eb9f9bacf8b26d11530bff0918c510d3826141d56eb87f8dfd
Debian Security Advisory 5512-1
Posted Oct 2, 2023
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5512-1 - Several vulnerabilities were discovered in Exim, a mail transport agent, which could result in remote code execution if the EXTERNAL or SPA/NTLM authenticators are used.

tags | advisory, remote, vulnerability, code execution
systems | linux, debian
advisories | CVE-2023-42114, CVE-2023-42115, CVE-2023-42116
SHA-256 | a28c2d03163448e0e92324757faf8e3aa4ac5645fdda00d5756c2bf6e82c4a31
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