Vulnerability in Opensmtpd

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.

EPSS: 0.028 (85.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-35679?
CVE-2020-35679 is a high-severity vulnerability in Opensmtpd, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2020-12-24.
How severe is CVE-2020-35679?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-35679 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.