USN-3258-2

USN-3258-1 intended to fix a vulnerability in Dovecot. Further investigation revealed that only Dovecot versions 2.2.26 and newer were affected by the vulnerability. Additionally, the change introduced a regression when Dovecot was configured to use the "dict" authentication database. This update reverts the change. We apologize for the inconvenience.

Original advisory details:

It was discovered that Dovecot incorrectly handled some usernames. An attacker could possibly use this issue to cause Dovecot to hang or crash, resulting in a denial of service.

References

Affected packages

Ubuntu:16.04:LTS / dovecot

Package

Name: dovecot
Purl: pkg:deb/ubuntu/dovecot@1:2.2.22-1ubuntu2.4?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1:2.2.22-1ubuntu2.4

Affected versions

1:2.*

1:2.2.18-2ubuntu2

1:2.2.22-1ubuntu1

1:2.2.22-1ubuntu2

1:2.2.22-1ubuntu2.1

1:2.2.22-1ubuntu2.2

1:2.2.22-1ubuntu2.3

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-core"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-core-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-dbg"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-dev"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-dev-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-gssapi"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-gssapi-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-imapd"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-imapd-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-ldap"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-ldap-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-lmtpd"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-lmtpd-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-lucene"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-lucene-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-managesieved"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-managesieved-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-mysql"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-mysql-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-pgsql"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-pgsql-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-pop3d"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-pop3d-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-sieve"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-sieve-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-solr"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-solr-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-sqlite"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "dovecot-sqlite-dbgsym"
        },
        {
            "binary_version": "1:2.2.22-1ubuntu2.4",
            "binary_name": "mail-stack-delivery"
        }
    ]
}