Veracode Vulnerability DatabaseVERACODE:28836Denial Of Service (DoS)
EPSS
Percentile
81.1%
opensmtpd is vulnerable to denial of service. The smtpd/lka_filter.c, in certain configurations, allows remote attackers to cause a denial of service via a NULL pointer dereference and daemon crash using a malicious pattern of client activity as the filter state machine does not properly maintain the I/O channel between the SMTP engine and the filters layer.
References
github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1
lists.fedoraproject.org/archives/list/[email protected]/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/
lists.fedoraproject.org/archives/list/[email protected]/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/
poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixed-several-bugs-proposed-several-diffs-book-is-on-github/
security-tracker.debian.org/tracker/CVE-2020-35680
security.gentoo.org/glsa/202105-12
www.mail-archive.com/[email protected]/msg05188.html
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