VDB

CVE-2020-35680

CVE-2020-35680 PUBLISHED CVSS 7.5 HIGH

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.

EPSS 3.65% · 89.5th percentile

Risk Scores

CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
3.65%
89.5th percentile

Affected Products

VendorProductVersions
Ubuntu:20.04:LTSopensmtpd0, 6.0.3p1-6, 6.6.1p1-4
Ubuntu:24.04:LTSopensmtpd7.3.0p1-1, 7.4.0p1-1build4, *
Ubuntu:Pro:14.04:LTSopensmtpd5.4.1p1-1, 0, *
Ubuntu:25.10opensmtpd*, 0, 7.5.0p0-1
Ubuntu:22.04:LTSopensmtpd0, 6.8.0p2-3, 6.8.0p2-4

Timeline

  • Dec 24, 2020 CVE Published
  • Apr 14, 2021 EPSS Score
  • Jun 23, 2021 EPSS Score
  • Oct 27, 2021 EPSS Score
  • Dec 29, 2021 EPSS Score
  • Jan 6, 2022 EPSS Score
  • Apr 1, 2022 EPSS Score
  • May 3, 2022 EPSS Score
  • Jul 5, 2022 EPSS Score
  • Nov 9, 2022 EPSS Score
  • Jan 11, 2023 EPSS Score
  • Mar 15, 2023 EPSS Score

References

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