CVE-2018-6789
exim4 - security update
9.8
CRITICAL
CVSS 3.1
⚠ KEVEPSS 86.6%
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.
How to fix CVE-2018-6789
To remediate CVE-2018-6789, upgrade the affected package to a fixed version below.
- Debian/exim4—upgrade to 4.90.1-1 or later
- —upgrade to 4.80-7+deb7u6 or later
- —upgrade to 4.84.2-2+deb8u5 or later
Is CVE-2018-6789 being exploited?
Yes — CVE-2018-6789 is on the CISA Known Exploited Vulnerabilities (KEV) catalog. Patch immediately.
Affected packages (3)
- from 0, < 4.90.1-1
- from 0, < 4.80-7+deb7u6
- from 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 |