CVE-2020-35679

Published: Dec 24, 2020Modified: Nov 21, 2024

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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.

Affected (5)

Products: Opensmtpd: Opensmtpd · Fedoraproject: Fedora

1 product

1 product

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Opensmtpd Opensmtpd	Before 6.8.0
Opensmtpd Opensmtpd	Version 6.8.0
Opensmtpd Opensmtpd	Version 6.8.0 patch1-rc1

Configuration B

2 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 32
Fedoraproject Fedora	Version 33

Related CWEs

CWE-401

Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.

References (12)

https://github.com/openbsd/src/commit/79a034b4aed29e965f45a13409268290c9910043

Source: cve@mitre.org

PatchThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/

Source: cve@mitre.org

https://poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixed-several-bugs-proposed-several-diffs-book-is-on-github/

Source: cve@mitre.org

Third Party Advisory

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

Source: cve@mitre.org

Third Party Advisory

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

Source: cve@mitre.org

https://github.com/openbsd/src/commit/79a034b4aed29e965f45a13409268290c9910043