Vulnerability Name:

CVE-2015-3420 (CCN-102605)

Assigned:2015-04-26
Published:2015-04-26
Updated:2017-10-05
Summary:The ssl-proxy-openssl.c function in Dovecot before 2.2.17, when SSLv3 is disabled, allow remote attackers to cause a denial of service (login process crash) via vectors related to handshake failures.
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)
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
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
3.7 Low (Temporal CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P/E:U/RL:U/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
4.2 Medium (CCN Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:U/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-295
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2015-3420

Source: FEDORA
Type: Third Party Advisory
FEDORA-2015-7156

Source: FEDORA
Type: Third Party Advisory
FEDORA-2015-7089

Source: FEDORA
Type: Third Party Advisory
FEDORA-2015-7159

Source: CCN
Type: oss-security Mailing List, Sun, 26 Apr 2015 20:31:14 +0200
CVE request: Dovecot remote DoS on TLS connections

Source: CCN
Type: oss-security Mailing List, Mon, 27 Apr 2015 01:53:24 -0400 (EDT)
Re: CVE request: Dovecot remote DoS on TLS connections

Source: CCN
Type: Dovecot Web site
Dovecot

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20150427 Re: CVE request: Dovecot remote DoS on TLS connections

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20150428 Re: Re: CVE request: Dovecot remote DoS on TLS connections

Source: BID
Type: Third Party Advisory, VDB Entry
74335

Source: CONFIRM
Type: Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1216057

Source: MLIST
Type: Vendor Advisory
[dovecot-news] 20150513 [Dovecot-news] v2.2.17 released

Source: MLIST
Type: Vendor Advisory
[dovecot] 20150424 [patch] TLS Handshake failures can crash imap-login

Source: XF
Type: UNKNOWN
dovecot-cve20153420-dos(102605)

Vulnerable Configuration:Configuration 1:
  • cpe:/a:dovecot:dovecot:*:*:*:*:*:*:*:* (Version <= 2.2.16)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:20:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:21:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:22:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:dovecot:dovecot:2.2.16:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.trusty:def:20153420000
    V
    		CVE-2015-3420 on Ubuntu 14.04 LTS (trusty) - medium.
    2017-09-19
    oval:com.ubuntu.precise:def:20153420000
    V
    		CVE-2015-3420 on Ubuntu 12.04 LTS (precise) - medium.
    2015-04-27
    BACK
    dovecot dovecot *
    fedoraproject fedora 20
    fedoraproject fedora 21
    fedoraproject fedora 22
    dovecot dovecot 2.2.16