VDB
CVE-2020-35680
CVE-2020-35680
PUBLISHED
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 5.80% · 90.7th percentile
Risk Scores
EPSS Score
5.80%
90.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:20.04:LTS | opensmtpd | 6.6.1p1-4, 6.6.1p1-5, 6.6.2p1-1 |
| Ubuntu:24.04:LTS | opensmtpd | 7.3.0p2-1, *, * |
| Ubuntu:Pro:14.04:LTS | opensmtpd | 0, *, 5.4.1p1-1ubuntu0.1~esm1 |
| Ubuntu:25.10 | opensmtpd | *, 0, 7.5.0p0-1 |
| Ubuntu:22.04:LTS | opensmtpd | 0, 6.8.0p2-3, 6.8.0p2-4 |
Timeline
- Dec 24, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 22, 2021 EPSS Score
- Oct 25, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 27, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 2, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Nov 5, 2022 EPSS Score
- Mar 10, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-35680 third-party-advisory
- https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1 third-party-advisory
- 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/ third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-35680 third-party-advisory