CVE-2020-35679
HIGHCVSS 7.5/10EPSS 2.83%
Last modified
CVE-2020-35679 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a "very significant" memory leak via messages to an instance that performs many regex lookups.. EPSS estimates a 2.83% chance of exploitation in the next 30 days.
Description
smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a "very significant" memory leak via messages to an instance that performs many regex lookups.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Opensmtpd | Opensmtpd | < 6.8.0 |
| Opensmtpd | Opensmtpd | 6.8.0 |
| Fedoraproject | Fedora | 32 |
| Fedoraproject | Fedora | 33 |
References
- https://github.com/openbsd/src/commit/79a034b4aed29e965f45a13409268290c9910043Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202105-12Third Party Advisory
- https://github.com/openbsd/src/commit/79a034b4aed29e965f45a13409268290c9910043Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202105-12Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-35679?
smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a "very significant" memory leak via messages to an instance that performs many regex lookups.
How severe is CVE-2020-35679?
CVE-2020-35679 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.83% probability of exploitation in the next 30 days.
How do I fix CVE-2020-35679?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-35679?
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Scan your code nowSource: NVD / NIST