CVE-2018-6789
CRITICAL9.8⚠ KEVEPSS 86.6%exim4 - security update
Published: 2/8/2018Modified: 4/28/2026Added to CISA KEV: 11/3/2021
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.
Affected packages (3)
- Debian/exim4from 0, < 4.90.1-1
- Debian/exim4from 0, < 4.80-7+deb7u6
- Debian/exim4from 0, < 4.84.2-2+deb8u5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |