Vulnerability Name:

CVE-2020-17085 (CCN-190739)

Assigned:2020-11-10
Published:2020-11-10
Updated:2021-07-21
Summary:Microsoft Exchange Server Denial of Service Vulnerability
CVSS v3 Severity:4.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)
4.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/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): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L)
5.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): Low
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:S/C:C/I:C/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Partial
Vulnerability Type:CWE-20
Vulnerability Consequences:Gain Privileges
References:Source: MITRE
Type: CNA
CVE-2020-17085

Source: XF
Type: UNKNOWN
ms-exchange-cve202017085-priv-esc(190739)

Source: CCN
Type: Microsoft Security TechCenter - November 2020
Microsoft Exchange Server Denial of Service Vulnerability

Source: MISC
Type: Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17085

Vulnerable Configuration:Configuration 1:
  • cpe:/a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
  • OR cpe:/a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:*
  • OR cpe:/a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*
  • OR cpe:/a:microsoft:exchange_server:2019:cumulative_update_6:*:*:*:*:*:*
  • OR cpe:/a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    microsoft exchange server 2013 cumulative_update_23
    microsoft exchange server 2016 cumulative_update_17
    microsoft exchange server 2016 cumulative_update_18
    microsoft exchange server 2019 cumulative_update_6
    microsoft exchange server 2019 cumulative_update_7
    microsoft exchange server 2013 cumulative_update_23