Microsoft Exchange Server 2013 CU23/2016 CU13/2016 CU14/2019 CU2/2019 CU3 Metadata deserialization

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.2$5k-$25k0.00

A vulnerability, which was classified as critical, has been found in Microsoft Exchange Server 2013 CU23/2016 CU13/2016 CU14/2019 CU2/2019 CU3 (Groupware Software). This issue affects some unknown functionality of the component Metadata Handler. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-502. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A remote code execution vulnerability exists in Microsoft Exchange through the deserialization of metadata via PowerShell, aka 'Microsoft Exchange Remote Code Execution Vulnerability'.

The weakness was presented 11/12/2019 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated in cooperation with Microsoft. The identification of this vulnerability is CVE-2019-1373. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/13/2019). The advisory points out:

A remote code execution vulnerability exists in Microsoft Exchange through the deserialization of metadata via PowerShell. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the logged in user.

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

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VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

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VulDB Base Score: 🔍
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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-502
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

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Timelineinfoedit

11/12/2019 🔍
11/12/2019 +0 days 🔍
11/13/2019 +1 days 🔍
11/13/2019 +0 days 🔍

Sourcesinfoedit

Vendor: https://www.microsoft.com/

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

CVE: CVE-2019-1373 (🔍)

Entryinfoedit

Created: 11/13/2019 06:46 AM
Changes: (17) software_type vulnerability_cwe vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a source_cve_nvd_summary
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