Microsoft Exchange Server 2016 CU17/2016 CU18/2019 CU6/2019 CU7 code injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Microsoft Exchange Server 2016 CU17/2016 CU18/2019 CU6/2019 CU7. This affects an unknown part. Executing a manipulation can lead to an unknown weakness. This vulnerability is handled as CVE-2020-17141. The attack can be executed remotely. Additionally, an exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in Microsoft Exchange Server 2016 CU17/2016 CU18/2019 CU6/2019 CU7 (Groupware Software). It has been declared as critical. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 12/08/2020 as confirmed security guidance (Website). The advisory is available at portal.msrc.microsoft.com. This vulnerability was named CVE-2020-17141. Successful exploitation requires user interaction by the victim. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

A public exploit has been developed by Steven Seeley/Chris Anastasio in Python and been published 3 days after the advisory. It is possible to download the exploit at srcincite.io. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.4
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 8.4
Vendor Vector (Microsoft): 🔍

NVD Base Score: 8.4
NVD Vector: 🔍

CNA Base Score: 8.4
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Steven Seeley/Chris Anastasio
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

08/04/2020 🔍
12/08/2020 +126 days 🔍
12/08/2020 +0 days 🔍
12/09/2020 +0 days 🔍
12/11/2020 +1 days 🔍
08/29/2025 +1722 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed

CVE: CVE-2020-17141 (🔍)
GCVE (CVE): GCVE-0-2020-17141
GCVE (VulDB): GCVE-100-165706
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/09/2020 01:39
Updated: 08/29/2025 06:04
Changes: 12/09/2020 01:39 (34), 12/09/2020 01:43 (18), 12/11/2020 20:37 (7), 12/13/2020 13:15 (2), 12/13/2020 13:19 (18), 03/16/2023 09:37 (3), 08/29/2025 06:04 (25)
Complete: 🔍
Committer: misc
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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