Vulnerability CVE-2019-1084 - CERT Civis.Net

Vulnerability Name:

CVE-2019-1084 (CCN-163009)

Assigned:

2018-11-26

Published:

2019-07-09

Updated:

2020-05-04

Summary:

An information disclosure vulnerability exists when Exchange allows creation of entities with Display Names having non-printable characters. An authenticated attacker could exploit this vulnerability by creating entities with invalid display names, which, when added to conversations, remain invisible. This security update addresses the issue by validating display names upon creation in Microsoft Exchange, and by rendering invalid display names correctly in Microsoft Outlook clients., aka 'Microsoft Exchange Information Disclosure Vulnerability'.

CVSS v3 Severity:

6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): None Availibility (A): None

4.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
3.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): Low Integrity (I): None Availibility (A): None

CVSS v2 Severity:

4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

4.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

Vulnerability Type:

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2019-1084

Source: XF
Type: UNKNOWN
ms-exchange-cve20191084-info-disc(163009)

Source: CCN
Type: Microsoft Security TechCenter - July 2019
Microsoft Exchange Information Disclosure Vulnerability

Source: MISC
Type: Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1084

Vulnerable Configuration:

Configuration 1:

cpe:/a:microsoft:exchange_server:2010:sp2:*:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2016:cumulative_update_1:*:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2016:cumulative_update_2:*:*:*:*:*:*

OR cpe:/a:microsoft:lync:2013:sp1:*:*:*:*:*:*

OR cpe:/a:microsoft:lync_basic:2013:sp1:*:*:*:*:*:*

OR cpe:/a:microsoft:mail_and_calendar:-:*:*:*:*:*:*:*

OR cpe:/a:microsoft:office:2010:sp2:*:*:*:*:*:*

OR cpe:/a:microsoft:office:2013:sp1:*:*:*:*:*:*

OR cpe:/a:microsoft:office:2016:*:*:*:*:*:*:*

OR cpe:/a:microsoft:office:2016:*:*:*:*:mac_os:*:*

OR cpe:/a:microsoft:office:2019:*:*:*:*:*:*:*

OR cpe:/a:microsoft:office:2019:*:*:*:*:macos:*:*

OR cpe:/a:microsoft:office_365_proplus:-:*:*:*:*:*:*:*

OR cpe:/a:microsoft:outlook:-:*:*:*:*:iphone_os:*:*

OR cpe:/a:microsoft:outlook:2013:sp1:*:*:*:*:*:*

OR cpe:/a:microsoft:outlook:2016:*:*:*:*:*:*:*

OR cpe:/a:microsoft:outlook:2016:*:*:*:*:android:*:*

OR cpe:/a:microsoft:skype_for_business:2016:*:*:*:*:*:*:*

OR cpe:/a:microsoft:skype_for_business_basic:2016:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:microsoft:outlook:2010:sp2:*:*:*:*:x32:*

OR cpe:/a:microsoft:outlook:2010:sp2:*:*:*:*:x64:*

OR cpe:/a:microsoft:exchange_server:2010:sp3:*:*:*:*:*:*

OR cpe:/a:microsoft:office:2013:sp1:x32:*:*:*:*:*

OR cpe:/a:microsoft:office:2013:sp1:*:*:*:*:x64:*

OR cpe:/a:microsoft:office:2013:sp1:*:*:rt:*:*:*

OR cpe:/a:microsoft:lync_basic:2013:sp1:*:*:*:*:x32:*

OR cpe:/a:microsoft:lync:2013:sp1:*:*:*:*:x64:*

OR cpe:/a:microsoft:lync_basic:2013:sp1:*:*:*:*:x64:*

OR cpe:/a:microsoft:office:2016:*:x32:*:*:*:*:*

OR cpe:/a:microsoft:office:2016:*:*:*:*:*:x64:*

OR cpe:/a:microsoft:office:2016:*:*:*:*:mac:*:*

OR cpe:/a:microsoft:outlook:2016:*:*:*:*:*:x32:*

OR cpe:/a:microsoft:outlook:2016:*:*:*:*:*:x64:*

OR cpe:/a:microsoft:outlook:2013:sp1:*:*:*:*:x32:*

OR cpe:/a:microsoft:outlook:2013:sp1:*:*:*:*:x64:*

OR cpe:/a:microsoft:office:2019:*:~~~click-to-run~~:*:*:*:x32:*

OR cpe:/a:microsoft:office:2019:*:*:*:click-to-run:*:x64:*

OR cpe:/a:microsoft:office_365_proplus:-:*:*:*:*:*:x32:*

OR cpe:/a:microsoft:office_365_proplus:-:*:*:*:*:*:x64:*

OR cpe:/a:microsoft:office:2019:*:mac:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2019:cumulative_update_1:*:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:*

OR cpe:/a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:*

OR cpe:/a:microsoft:mail_and_calendar:-:*:*:*:*:*:*:*

Denotes that component is vulnerable