Multiple vulnerabilities in Microsoft Excel



Published: 2023-03-14
Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2023-23399
CVE-2023-23398
CVE-2023-23396
CWE-ID CWE-20
CWE-451
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Microsoft Office
Client/Desktop applications / Office applications

Microsoft Excel
Client/Desktop applications / Office applications

Microsoft 365 Apps for Enterprise
Client/Desktop applications / Office applications

Office Online Server
Server applications / Other server solutions

Microsoft Office Web Apps Server
Server applications / Application servers

Microsoft Office LTSC 2021
Other software / Other software solutions

Vendor Microsoft

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU73573

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-23399

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Excel. A remote attacker can pass specially crafted input to the application and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2013 - 2019 for Mac

Office Online Server : All versions

Microsoft Excel: 2013 - 2016

Microsoft Office Web Apps Server: 2013 Service Pack 1

Microsoft Office LTSC 2021: 32 bit editions - 2021 for Mac

Microsoft 365 Apps for Enterprise: 32-bit Systems - 64-bit Systems

External links

http://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23399


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Spoofing attack

EUVDB-ID: #VU73582

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-23398

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in Microsoft Excel. A remote attacker can spoof page content.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2019

Microsoft Excel: 2013 - 2016

Microsoft Office LTSC 2021: 32 bit editions - 64 bit editions

Microsoft 365 Apps for Enterprise: 32-bit Systems - 64-bit Systems

External links

http://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23398


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Input validation error

EUVDB-ID: #VU73595

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-23396

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted XLSX file and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Office Online Server : All versions

Microsoft Office Web Apps Server: 2013 Service Pack 1

External links

http://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23396


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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