CVE-2020-35680

Name
CVE-2020-35680
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.
NVD Severity
medium
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
Patch https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1
Release Notes https://www.mail-archive.com/misc@opensmtpd.org/msg05188.html
Third Party Advisory https://poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixed-several-bugs-proposed-several-diffs-book-is-on-github/
Mailing List https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/
Mailing List https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/
GENTOO https://security.gentoo.org/glsa/202105-12

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:opensmtpd:opensmtpd:*:*:*:*:*:*:*:* opensmtpd >= None < 6.8.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
opensmtpd 3.10-main 6.0.3p1-r3 Jonathan Curran <jonathan@curran.in> possibly vulnerable
opensmtpd 3.12-main 6.6.4p1-r2 Jakub Jirutka <jakub@jirutka.cz> fixed
opensmtpd 3.11-main 6.6.4p1-r1 Jakub Jirutka <jakub@jirutka.cz> fixed
opensmtpd 3.13-main 6.7.1p1-r4 Jakub Jirutka <jakub@jirutka.cz> fixed