Arch Linux Security Advisory ASA-201802-6

Severity: High
Date : 2018-02-12
CVE-ID : CVE-2018-6789
Package : exim
Type : arbitrary code execution
Remote : Yes
Link : https://security.archlinux.org/AVG-608

Summary

The package exim before version 4.90.1-1 is vulnerable to arbitrary
code execution.

Resolution

Upgrade to 4.90.1-1.

pacman -Syu “exim>=4.90.1-1”

The problem has been fixed upstream in version 4.90.1.

Workaround

None.

Description

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.

Impact

A remote attacker is able to execute arbitrary code on the affected
host by sending a crafted message.

References

http://exim.org/static/doc/security/CVE-2018-6789.txt
https://marc.info/?l=oss-security&m=151828631632609
https://security.archlinux.org/CVE-2018-6789