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CVE-2018-6789

Publication date 7 February 2018

Last updated 21 August 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

Status

Package Ubuntu Release Status
exim4 17.10 artful
Fixed 4.89-5ubuntu1.3
16.04 LTS xenial
Fixed 4.86.2-2ubuntu2.3
14.04 LTS trusty
Fixed 4.82-3ubuntu2.4

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H