UBUNTU-CVE-2017-2669

7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
3.7 (Low) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang.

References

Affected packages

Ubuntu:14.04:LTS / dovecot

Package

Name: dovecot
Purl: pkg:deb/ubuntu/dovecot@1:2.2.9-1ubuntu2.1?arch=source&distro=trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1:2.2.9-1ubuntu2.1

Affected versions

1:2.*

1:2.1.7-7ubuntu3

1:2.2.9-1ubuntu1

1:2.2.9-1ubuntu2

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-core"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-dbg"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-dev"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-gssapi"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-imapd"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-ldap"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-lmtpd"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-managesieved"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-mysql"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-pgsql"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-pop3d"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-sieve"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-solr"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "dovecot-sqlite"
        },
        {
            "binary_version": "1:2.2.9-1ubuntu2.1",
            "binary_name": "mail-stack-delivery"
        }
    ]
}