CVE-2020-35679

HIGH

Opensmtpd < 6.8.0 - Memory Leak

Title source: rule

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.

References (6)

[Patch, Third Party Advisory] https://github.com/openbsd/src/commit/79a034b4aed29e965f45a13409268290c9910043

View Patch ZIP pw:eip

[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://security.gentoo.org/glsa/202105-12

[Mailing List] https://www.mail-archive.com/misc%40opensmtpd.org/msg05188.html

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/

Scores

CVSS v3 7.5

EPSS 0.0170

EPSS Percentile 82.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

CWE

CWE-401

Status published

Affected Products (5)

opensmtpd/opensmtpd < 6.8.0

opensmtpd/opensmtpd

fedoraproject/fedora

Timeline

Published Dec 24, 2020

Tracked Since Feb 18, 2026