Microsoft Office up to 2019 Excel memory corruption

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CVSS Meta Temp Score
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7.3$5k-$25k0.00

A vulnerability, which was classified as critical, was found in Microsoft Office up to 2019 (Office Suite Software). Affected is an unknown code block of the component Excel. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was shared 09/08/2020 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. The vendor cooperated in the coordination of the public release. This vulnerability is traded as CVE-2020-1193 since 11/04/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 11/13/2020). The advisory points out:

A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

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

The entry 160917 is related to this item.

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VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.8
Vendor Vector (Microsoft): 🔒

NVD Base Score: 8.8
NVD Vector: 🔒

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
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Exploitinginfoedit

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

Reaction Time: 🔒
0-Day Time: 🔒
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Timelineinfoedit

11/04/2019 CVE assigned
09/08/2020 +309 days Advisory disclosed
09/08/2020 +0 days Countermeasure disclosed
09/09/2020 +1 days VulDB entry created
11/13/2020 +65 days VulDB last update

Sourcesinfoedit

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

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

CVE: CVE-2020-1193 (🔒)
See also: 🔒

Entryinfoedit

Created: 09/09/2020 01:42 PM
Updated: 11/13/2020 08:19 PM
Changes: (1) source_cve_assigned
Complete: 🔍

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