CVE-2020-12100

Reference Links

• http://seclists.org/fulldisclosure/2021/Jan/18
• http://www.openwall.com/lists/oss-security/2020/08/12/1
• http://www.openwall.com/lists/oss-security/2021/01/04/3
• https://dovecot.org/security
• https://lists.debian.org/debian-lts-announce/2020/08/msg00024.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/
• https://security.gentoo.org/glsa/202009-02
• https://usn.ubuntu.com/4456-1/
• https://usn.ubuntu.com/4456-2/
• https://www.debian.org/security/2020/dsa-4745
• https://launchpad.net/bugs/cve/CVE-2020-12100
• https://www.openwall.com/lists/oss-security/2020/08/12/1
• https://github.com/dovecot/core/commit/d4bb43a08ab9ecfab7249a17279e5f773c8abaad
• https://github.com/dovecot/core/commit/6d77e00e4d170efde908591dc5871a8e48ea844b
• https://github.com/dovecot/core/commit/926742088a3c66c11099386b2c6e80999c29f405
• https://github.com/dovecot/core/commit/e5830ae88531a32db36c97ebf122cba9a39cf801
• https://github.com/dovecot/core/commit/cb00e21fd70aae49453aedc1bb33c0765ab98667
• https://github.com/dovecot/core/commit/5ecadd30746d91854b5aa484feff9c70ea91c20b
• https://github.com/dovecot/core/commit/24f0bfefdbccaaaaab9f52be428648ec3f1c34d3
• https://github.com/dovecot/core/commit/02c7c6dbb51748a5af8b0c70a499a3ab17de8490
• https://github.com/dovecot/core/commit/729941c996ee0b0ede40f462c9e34ceb6a6bd049
• https://github.com/dovecot/core/commit/8dbc754a31fbf7684e858aa1fb633b8dfbeb13cf
• https://github.com/dovecot/core/commit/a175d654c3bc4d57641b871bbff99c10799b7d67
• https://github.com/dovecot/core/commit/a676cb539fc1545c58d1341baa2f875f7b694133
• https://github.com/dovecot/core/commit/0f46088a1af7b493db76a1d97ef4ecc6bb41f5a4
• https://github.com/dovecot/core/commit/7868f5f49be91fe51795b477a5440e69c1540716
• https://github.com/dovecot/core/commit/be53a118e789886efcdd57c513651c5148651161
• https://github.com/dovecot/core/commit/19193f40b1d74e8d4ef88121992b4a61d84773e3
• https://security-tracker.debian.org/tracker/CVE-2020-12100
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/
• https://ubuntu.com/security/notices/USN-4456-1
• https://ubuntu.com/security/notices/USN-4456-2
• https://www.cve.org/CVERecord?id=CVE-2020-12100
• https://nvd.nist.gov/vuln/detail/CVE-2020-12100
• https://ubuntu.com/security/CVE-2020-12100

Parent vulnerabilities

(Appears in the following advisories)

• USN-4456-1
• USN-4456-2

Frequently Asked Questions

• What is CVE-2020-12100?

  CVE-2020-12100 is a vulnerability in Dovecot that allows remote attackers to cause a denial of service by sending a crafted e-mail message with deeply nested MIME parts.

• What is the severity of CVE-2020-12100?

  The severity of CVE-2020-12100 is high with a severity value of 7.5.

• How does CVE-2020-12100 affect Dovecot?

  CVE-2020-12100 affects versions of Dovecot before 2.3.11.3.

• How can I fix CVE-2020-12100?

  To fix CVE-2020-12100, update Dovecot to version 2.3.11.3 or later.

• Where can I find more information about CVE-2020-12100?

  You can find more information about CVE-2020-12100 on the following websites: [http://seclists.org/fulldisclosure/2021/Jan/18](http://seclists.org/fulldisclosure/2021/Jan/18), [http://www.openwall.com/lists/oss-security/2020/08/12/1](http://www.openwall.com/lists/oss-security/2020/08/12/1), [http://www.openwall.com/lists/oss-security/2021/01/04/3](http://www.openwall.com/lists/oss-security/2021/01/04/3).