CVE-2020-12100

NameCVE-2020-12100
DescriptionIn Dovecot before 2.3.11.3, uncontrolled recursion in submission, lmtp, and lda allows remote attackers to cause a denial of service (resource consumption) via a crafted e-mail message with deeply nested MIME parts.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2328-1, DSA-4745-1
NVD severitymedium
Debian Bugs968302

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
dovecot (PTS)stretch1:2.2.27-3+deb9u5vulnerable
stretch (security)1:2.2.27-3+deb9u6fixed
buster1:2.3.4.1-5+deb10u4fixed
buster (security)1:2.3.4.1-5+deb10u3fixed
bullseye, sid1:2.3.11.3+dfsg1-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dovecotsourcestretch1:2.2.27-3+deb9u6DLA-2328-1
dovecotsourcebuster1:2.3.4.1-5+deb10u3DSA-4745-1
dovecotsource(unstable)1:2.3.11.3+dfsg1-1968302

Notes

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

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