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Vulnerability of OpenBSD 6.7: denial of service via smtpd_sockaddr

Synthesis of the vulnerability 

An attacker can trigger a fatal error via smtpd_sockaddr of OpenBSD 6.7 (OpenSMTPD), in order to trigger a denial of service.
Vulnerable products: OpenBSD.
Severity of this weakness: 2/4.
Creation date: 25/05/2020.
Références of this bulletin: VIGILANCE-VUL-32334.

Description of the vulnerability 

An attacker can trigger a fatal error via smtpd_sockaddr of OpenBSD 6.7 (OpenSMTPD), in order to trigger a denial of service.
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This computer threat alert impacts software or systems such as OpenBSD.

Our Vigil@nce team determined that the severity of this weakness announce is medium.

The trust level is of type confirmed by the editor, with an origin of internet server.

An attacker with a expert ability can exploit this computer weakness bulletin.

Solutions for this threat 

OpenBSD: patch for smtpd_sockaddr.
A patch is available:
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.7/common/006_smtpd_sockaddr.patch.sig
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