CVE-2017-16943
exim4 - security update
9.8
CRITICAL
CVSS 3.1
EPSS 74.5%
Description
The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.
How to fix CVE-2017-16943
To remediate CVE-2017-16943, upgrade the affected package to a fixed version below.
- Debian/exim4—upgrade to 4.89-12 or later
- —upgrade to 4.89-2+deb9u2 or later
Is CVE-2017-16943 being exploited?
Likely — EPSS is 74.5%, placing CVE-2017-16943 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (2)
- from 0, < 4.89-12
- from 0, < 4.89-2+deb9u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |