CVE-2020-35680
7.5
HIGH
CVSS 3.1
EPSS 5.8%
Description
smtpd/lka_filter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between the SMTP engine and the filters layer.
How to fix CVE-2020-35680
To remediate CVE-2020-35680, upgrade the affected package to a fixed version below.
- Alpine/opensmtpd—upgrade to 6.6.4p1-r1 or later
- —upgrade to 6.8.0p2-1 or later
Is CVE-2020-35680 being exploited?
Moderate — EPSS is 5.8%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (2)
- from 0, < 6.6.4p1-r1
- from 0, < 6.8.0p2-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |