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[email protected]CVE-2017-2669

HistoryJun 21, 2018 - 1:29 p.m.

CVE-2017-2669

2018-06-2113:29:00

CWE-20

[email protected]

web.nvd.nist.gov

dovecot

denial of service

cve-2017-2669

security

vulnerability

nvd

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.2 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.013 Low

EPSS

Percentile

86.0%

JSON

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.

Affected configurations

Vulners

NVD

Node

redhatredhat_package_managerRange≤2.2.29

CPENameOperatorVersion
dovecot:dovecotdovecotle2.2.28

CPE	Name	Operator	Version
dovecot:dovecot	dovecot	le	2.2.28

CNA Affected

[
  {
    "product": "dovecot",
    "vendor": "[UNKNOWN]",
    "versions": [
      {
        "status": "affected",
        "version": "dovecot 2.2.29"
      }
    ]
  }
]