CVE-2024-38172

Heap-based Buffer Overflow (CWE-122)

Published: Aug 13, 2024

010
CVSS 7.8EPSS 0.05%High
CVE info copied to clipboard

Summary

A Remote Code Execution Vulnerability exists in Microsoft Excel. This vulnerability is classified as a Heap-based Buffer Overflow (CWE-122). The attack vector is local and requires user interaction. The vulnerability has high impacts on confidentiality, integrity, and availability.

Impact

If exploited, this vulnerability could allow an attacker to execute arbitrary code in the context of the current user. Given the high impact on confidentiality, integrity, and availability, successful exploitation could lead to unauthorized access to sensitive information, modification of data, or disruption of system availability. The attack requires user interaction, which likely means opening a maliciously crafted Excel file.

Exploitation

There is no evidence that a public proof-of-concept exists. There is no evidence of proof of exploitation at the moment.

Patch

A patch is available for this vulnerability. Microsoft released the patch on August 13, 2024. It is available through the Microsoft Update Guide.

Mitigation

1. Apply the security update provided by Microsoft as soon as possible. 2. Implement the principle of least privilege, ensuring users operate with minimal necessary permissions. 3. Educate users about the risks of opening untrusted Excel files from unknown sources. 4. Consider using application whitelisting to prevent unauthorized applications from executing. 5. Keep all Microsoft Office products, especially Excel, updated to the latest version. 6. For Microsoft 365 Apps and Office Long Term Servicing Channel 2021 on macOS, ensure these specific versions are patched. 7. Use endpoint detection and response (EDR) solutions to detect and prevent exploitation attempts.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Timeline

CVSS

A CVSS base score of 7.8 has been assigned.

Aug 13, 2024 at 5:35 PM / microsoft
First Article

Feedly found the first article mentioning CVE-2024-38172. See article

Aug 13, 2024 at 6:07 PM / Zero Day Initiative - Blog
CVE Assignment

NVD published the first details for CVE-2024-38172

Aug 13, 2024 at 6:15 PM
CVSS Estimate

Feedly estimated the CVSS score as HIGH

Aug 13, 2024 at 6:23 PM
EPSS

EPSS Score was set to: 0.05% (Percentile: 20.9%)

Nov 19, 2024 at 4:33 PM
Static CVE Timeline Graph

Affected Systems

Microsoft/office_long_term_servicing_channel
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Patches

Microsoft
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Attack Patterns

CAPEC-92: Forced Integer Overflow
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References

Microsoft August 2024 Security Updates
Classification: Critical, Solution: Official Fix, Exploit Maturity: High, CVSSv3.1: 9.8, CVEs: CVE-2024-21302, CVE-2024-29995, CVE-2024-37968, CVE-2024-38063, CVE-2024-38084, CVE-2024-38098, CVE-2024-38106, CVE-2024-38107, CVE-2024-38108, CVE-2024-38109, CVE-2024-38114, CVE-2024-38115, CVE-2024-38116, CVE-2024-38117, CVE-2024-38118, CVE-2024-38120, CVE-2024-38121, CVE-2024-38122, CVE-2024-38123, CVE-2024-38125 (+82 other associated CVEs), Summary: https://www.bleepingcomputer.com/news/microsoft/microsoft-august-2024-patch-tuesday-fixes-9-zero-days-6-exploited/ Today is Microsoft's August 2024 Patch Tuesday, which includes security updates for 89 flaws, including six actively exploited and three publicly disclosed zero-days. Microsoft is still working on an update for a tenth publicly disclosed zero-day. This Patch Tuesday fixed eight critical vulnerabilities, which were a mixture of elevation of privileges, remote code execution, and information disclosure. The number of bugs in each vulnerability category is listed below:
VERT Threat Alert: August 2024 Patch Tuesday Analysis
While updates for CVE-2024-38200 were released as part of the August Patch Tuesday drop, Microsoft had already enabled a fix for this issue on July 30, meaning that all users of supported versions of Office were protected. This vulnerability, a privilege escalation in the Windows Kernel, requires that the attacker win a race condition to successfully exploit it.

News

Security Updates for Microsoft Office Products C2R (Aug 2024)
An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. An attacker can exploit this to perform actions with the privileges of another user.
CNNVD | 关于微软多个安全漏洞的通报
近日,微软官方发布了多个安全漏洞的公告,其中微软产品本身漏洞84个,影响到微软产品的其他厂商漏洞5个。
Microsoft’s August Security Update on High-Risk Vulnerabilities in Multiple Products - Security Boulevard
On August 14, NSFOCUS CERT detected that Microsoft released a security update patch for August, which fixed 90 security issues involving widely used products such as Windows, Microsoft Office, Visual Studio and Azure, including high-risk vulnerabilities such as privilege escalation and remote code execution. Due to an error in the Windows Power Dependency Coordinator after release, local attackers authenticated by ordinary users can exploit this vulnerability by running special programs to obtain SYSTEM permissions of the target system.
CNNVD关于微软多个安全漏洞的通报
近日,微软官方发布了多个安全漏洞的公告,其中微软产品本身漏洞84个,影响到微软产品的其他厂商漏洞5个。
Microsoft Project Remote Code Execution Vulnerability (CVE-2024-38189)
Development Last Updated: 8/15/2024 CVEs: CVE-2024-38171 , CVE-2024-38169 , CVE-2024-38173 , CVE-2024-38189 , CVE-2024-38172 , CVE-2024-38084 , CVE-2024-38170
See 28 more articles and social media posts

CVSS V3.1

Attack Vector:Local
Attack Complexity:Low
Privileges Required:None
User Interaction:Required
Scope:Unchanged
Confidentiality:High
Integrity:High
Availability Impact:High

Categories

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