CVE-2020-35680
7.5 · HIGHOverview
CVE-2020-35680 is a high-severity vulnerability affecting opensmtpd opensmtpd. It was published on December 24, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from opensmtpd. Update opensmtpd to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| opensmtpd | opensmtpd | >= 0, < 6.8.0 | Affected |
References
Frequently Asked Questions
What is CVE-2020-35680?
CVE-2020-35680 is a high-severity vulnerability affecting opensmtpd opensmtpd. It was published on December 24, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2020-35680?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-35680?
Check the references section for vendor advisories and patches from opensmtpd. Update opensmtpd to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-35680?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-35680 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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