Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2020-7046
CVE-2020-7046:
Dovecot vulnerability analysis and mitigation
Overview
The vulnerability CVE-2020-7046 affects lib-smtp in submission-login and lmtp components in Dovecot 2.3.9 before version 2.3.9.3. The vulnerability was discovered by Open-Xchange oy and was disclosed on February 12, 2020 (Openwall, Dovecot News).
Technical details
The vulnerability is classified as an Improper Input Validation (CWE-30) issue with a CVSS score of 7.5 (CVSS3.1:AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). The lib-smtp component doesn't handle truncated command parameters properly, which results in an infinite loop consuming 100% CPU for the affected process (Openwall).
Impact
The vulnerability can lead to denial of service and CPU resource exhaustion. When exploited, attackers can cause submission-login and lmtp processes to be exhausted, affecting the server's performance and availability (Openwall).
Mitigation and workarounds
The vulnerability was fixed in Dovecot version 2.3.9.3. Users are advised to upgrade to this version or later to mitigate the risk (Fedora Update, Openwall).
Additional resources
Source: This report was generated using AI
Related Dovecot vulnerabilities:
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