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Gentoo: 202105-12 Low: OpenSMTPD Denial of Service Risks

gentoo
Calendar Grey May 26, 2021
Dist Gentoo Esm H88
Users of OpenSMTPD are encouraged to upgrade in order to address several vulnerabilities reported in Gentoo Linux Advisory GLSA 202105-12.
Multiple vulnerabilities have been found in OpenSMTPD, the worst of which could result in a Denial of Service condition.

Summary

Multiple vulnerabilities have been discovered in OpenSMTPD. Please review the CVE identifiers referenced below for details.

Topics%20covered

Topics Covered

security advisory denial of service gentoo software update security fix multiple issues gentoo linux opensmtpd

Resolution

All OpenSMTPD users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=mail-mta/opensmtpd-6.8.0_p2"

References

[ 1 ] CVE-2020-35679 https://nvd.nist.gov/vuln/detail/CVE-2020-35679 [ 2 ] CVE-2020-35680 https://nvd.nist.gov/vuln/detail/CVE-2020-35680

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202105-12
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity
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Severity: Low
Title: OpenSMTPD: Multiple vulnerabilities
Date: May 26, 2021
Bugs: #761945
ID: 202105-12

Topics%20covered

Topics Covered

security advisory denial of service gentoo software update security fix multiple issues gentoo linux opensmtpd

Synopsis

Multiple vulnerabilities have been found in OpenSMTPD, the worst of which could result in a Denial of Service condition.

Background

OpenSMTPD is a lightweight but featured SMTP daemon from OpenBSD.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 mail-mta/opensmtpd < 6.8.0_p2 >= 6.8.0_p2

Impact

===== A remote attacker, by connecting to the SMTP listener daemon, could possibly cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

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