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NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package opensmtpd  (opens in a new tab)

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EPSS
3.65% (90th percentile)

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  • Snyk IDSNYK-UBUNTU1604-OPENSMTPD-1054801
  • published29 Dec 2020
  • disclosed24 Dec 2020
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Introduced: 24 Dec 2020

CVE-2020-35680  (opens in a new tab)
CWE-476  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:16.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream opensmtpd package and not the opensmtpd package as distributed by Ubuntu.

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.

References