CVE-2020-35680
moderate-risk
Published 2020-12-24
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.
Do I need to act?
~
4.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Vendors
References (12)
Third Party Advisory
https://poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixe...
Third Party Advisory
https://security.gentoo.org/glsa/202105-12
Third Party Advisory
https://poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixe...
Third Party Advisory
https://security.gentoo.org/glsa/202105-12
45
/ 100
moderate-risk
Severity
26/34 · High
Exploitability
7/34 · Low
Exposure
12/34 · Low