CVE-2017-2669

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
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.
Overview
  • CVE ID
  • CVE-2017-2669
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Modified
  • Published Version
  • 2018-06-21T13:29:00
  • Last Modified Date
  • 2019-10-09T23:27:03
Weakness Enumerations
CWE URL
CWE-20 http://cwe.mitre.org/data/definitions/20.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* 1 OR 2.2.26 2.2.28
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch Third Party Advisory
https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669 Issue Tracking Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/04/11/1 Mailing List Third Party Advisory
https://www.debian.org/security/2017/dsa-3828 Third Party Advisory
http://www.securityfocus.com/bid/97536 Third Party Advisory VDB Entry
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2017-2669
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2669
History
Created Old Value New Value Data Type Notes
2022-05-10 17:09:28 Added to TrackCVE
2022-12-03 08:19:34 2018-06-21T13:29Z 2018-06-21T13:29:00 CVE Published Date updated
2022-12-03 08:19:34 2019-10-09T23:27:03 CVE Modified Date updated
2022-12-03 08:19:34 Modified Vulnerability Status updated