CVE-2017-16944
7.5
HIGH
CVSS 3.1
EPSS 77.9%
Description
The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character signifying the end of the content, related to the bdat_getc function.
How to fix CVE-2017-16944
To remediate CVE-2017-16944, upgrade the affected package to a fixed version below.
- Debian/exim4—upgrade to 4.89-13 or later
Is CVE-2017-16944 being exploited?
Likely — EPSS is 77.9%, placing CVE-2017-16944 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (1)
- from 0, < 4.89-13
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |