Memory leak in OpenSMTPD - CVE-2020-35679

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Main Vulnerability Database Vulnerabilities #VU49180

Memory leak in OpenSMTPD - CVE-2020-35679

Published: December 24, 2020 / Updated: December 29, 2020


Vulnerability identifier: #VU49180
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-35679
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
OpenSMTPD
Software vendor:
OpenBSD

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in smtpd/table.c when processing messages. A remote attacker can send a specially crafted message and trigger the daemon to perform multiple regex lookups, which in turn will leak memory.


Remediation

Install updates from vendor's website.

External links