CVE-2023-42119 Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability

2024-05-0302:13:26

CWE-125

zdi

www.cve.org

exim

dnsdb

out-of-bounds

read

information

disclosure

vulnerability

tcp

port 25

validation

user-supplied data

buffer

arbitrary code

zdi-can-17643

CVSS3

3.1

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

AI Score

5.9

Confidence

Low

EPSS

0.001

Percentile

28.8%

JSON

Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information 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 read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account.
. Was ZDI-CAN-17643.

CNA Affected

[
  {
    "vendor": "Exim",
    "product": "Exim",
    "versions": [
      {
        "version": "exim 4.96-RC0-14-24b8ed847-XX",
        "status": "affected"
      }
    ],
    "defaultStatus": "unknown"
  }
]