vulnerability
Ubuntu: (CVE-2020-35680): opensmtpd vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:N/A:P) | Dec 24, 2020 | Jun 26, 2025 | Aug 18, 2025 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
Dec 24, 2020
Added
Jun 26, 2025
Modified
Aug 18, 2025
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.
Solution
no-fix-ubuntu-package
References
- CVE-2020-35680
- https://attackerkb.com/topics/CVE-2020-35680
- CWE-476
- URL-https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1
- URL-https://poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixed-several-bugs-proposed-several-diffs-book-is-on-github/
- URL-https://www.cve.org/CVERecord?id=CVE-2020-35680
- URL-https://www.mail-archive.com/[email protected]/msg05188.html
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