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Gentoo Linux Security Advisory GLSA 202101-01 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: Dovecot: Multiple vulnerabilities |
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Date: January 10, 2021 |
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Bugs: #763525 |
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ID: 202101-01 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilities have been found in Dovecot, the worst of which |
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could allow remote attackers to cause a Denial of Service condition. |
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Background |
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========== |
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|
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Dovecot is an open source IMAP and POP3 email server. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-mail/dovecot < 2.3.13 >= 2.3.13 |
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Description |
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=========== |
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|
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Multiple vulnerabilities have been discovered in Dovecot. Please review |
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the CVE identifiers referenced below for details. |
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|
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Impact |
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====== |
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|
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A remote attacker could send a specially crafted mail or send a |
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specially crafted IMAP command possibly resulting in a Denial of |
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Service condition or an authenticated remote attacker might be able to |
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discover the file system directory structure and access other users' |
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emails. |
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Workaround |
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========== |
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The information disclosure vulnerability can be mitigated by disabling |
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IMAP hibernation feature which isn't enabled by default. |
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Resolution |
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========== |
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All Dovecot users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-mail/dovecot-2.3.13" |
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References |
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========== |
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[ 1 ] CVE-2020-24386 |
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https://nvd.nist.gov/vuln/detail/CVE-2020-24386 |
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[ 2 ] CVE-2020-25275 |
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https://nvd.nist.gov/vuln/detail/CVE-2020-25275 |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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https://security.gentoo.org/glsa/202101-01 |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users' machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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https://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2021 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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https://creativecommons.org/licenses/by-sa/2.5 |
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