Vulnerability Name:

CVE-2016-8652 (CCN-122387)

Assigned:2016-10-12
Published:2017-02-16
Updated:2017-02-22
Summary:The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.
CVSS v3 Severity:5.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
5.9 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.4 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-20
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2016-8652

Source: MLIST
Type: Release Notes, Vendor Advisory
[dovecot-news] 20161203 v2.2.27 released

Source: CCN
Type: Dovecot Web site
Dovecot

Source: CCN
Type: oss-sec Mailing List, Fri, 2 Dec 2016 09:02:33 +0200
Important vulnerability in Dovecot (CVE-2016-8652)

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20161202 Important vulnerability in Dovecot (CVE-2016-8652)

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20161205 Re: Important vulnerability in Dovecot (CVE-2016-8652)

Source: BID
Type: Third Party Advisory, VDB Entry
94639

Source: CCN
Type: BID-94639
Dovecot Auth Component CVE-2016-8652 Denial of Service Vulnerability

Source: XF
Type: UNKNOWN
dovecot-cve20168652-dos(122387)

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2016-8652

Vulnerable Configuration:Configuration 1:
  • cpe:/a:dovecot:dovecot:*:*:*:*:*:*:*:* (Version <= 2.2.27)

    • Configuration CCN 1:
  • cpe:/a:dovecot:dovecot:2.2.26:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.precise:def:20168652000
    V
    		CVE-2016-8652 on Ubuntu 12.04 LTS (precise) - medium.
    2017-02-16
    oval:com.ubuntu.trusty:def:20168652000
    V
    		CVE-2016-8652 on Ubuntu 14.04 LTS (trusty) - medium.
    2017-02-16
    oval:com.ubuntu.xenial:def:20168652000
    V
    		CVE-2016-8652 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-02-16
    oval:com.ubuntu.xenial:def:201686520000000
    V
    		CVE-2016-8652 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-02-16
    BACK
    dovecot dovecot *
    dovecot dovecot 2.2.26