Microsoft Outlook Remote Code Execution Vulnerability (CVE-2023–36895)

Abstract

This article discusses the critical security vulnerability, CVE-2023–36895, which was published on August 8, 2023, and is associated with Microsoft Outlook. The vulnerability’s impact, severity, and implications are examined, with a focus on the potential risks it poses to users. Additionally, we explore the remediation steps and official fix provided by Microsoft to address this vulnerability.

Introduction

In the ever-evolving landscape of cybersecurity threats, vulnerabilities in popular software applications can have profound implications for individuals and organizations. One such vulnerability that has garnered attention is CVE-2023–36895, a Remote Code Execution Vulnerability in Microsoft Outlook. This article delves into the details of this vulnerability, analyzing its impact, severity, and the necessary steps to mitigate the associated risks.

Vulnerability Details

CVE-2023–36895

• Assigner: Microsoft
• Published Date: August 8, 2023
• Updated Date: August 26, 2023

Vulnerability Description

CVE-2023–36895 is categorized as a Remote Code Execution Vulnerability, which implies that a malicious actor could execute arbitrary code on a victim’s system remotely. This type of vulnerability is particularly concerning as it allows attackers to compromise the security of the affected system without physical access.

Impact Severity

The Common Vulnerability Scoring System (CVSS) assigns a severity score to vulnerabilities. In this case, CVE-2023–36895 is rated as critical with a CVSS score of 7.8 out of 10, indicating a high level of severity. This score reflects the potential for significant harm if the vulnerability is exploited.

Attack Vector

The vulnerability’s attack vector is remote, meaning that an attacker can exploit it from a distance without direct physical or logical access to the target system. This remote capability increases the potential for exploitation.

Attack Complexity

The attack complexity is rated as low, indicating that the conditions required for an attacker to exploit this vulnerability are relatively straightforward. This makes it more accessible for potential attackers.

Privileges Required

Interestingly, this vulnerability does not require the attacker to possess any special privileges on the target system. This characteristic makes it even more concerning, as it lowers the barrier for potential attackers.

User Interaction

User interaction is required to successfully exploit CVE-2023–36895. However, this interaction can take various forms, and it implies that the victim must, in some way, participate in the compromise of the vulnerable component.

Scope

The scope of this vulnerability is unchanged, meaning that a successful attack only impacts the vulnerable component (Microsoft Outlook) and does not extend to other system components.

Confidentiality, Integrity, and Availability

CVE-2023–36895 poses a high risk to confidentiality, integrity, and availability. Successful exploitation could lead to unauthorized access to sensitive information, tampering with data, and potential disruption of services.

Exploitation and Remediation

Exploitation

As of the original publication, there is no known proof of concept or exploit code available for CVE-2023–36895. However, it is important to note that the absence of exploit code does not guarantee safety. Organizations and individuals should not underestimate the potential risk this vulnerability poses.

Remediation

Microsoft has provided an official fix for CVE-2023–36895. Users and administrators are strongly encouraged to apply this fix promptly to mitigate the vulnerability. Additionally, it is crucial to stay informed about security updates and best practices for securing Microsoft Outlook and other software.

Conclusion

CVE-2023–36895 is a critical Remote Code Execution Vulnerability in Microsoft Outlook that demands immediate attention. Its high severity, low attack complexity, and the requirement for user interaction make it a significant security concern. Organizations and individuals should take proactive steps to apply the official fix provided by Microsoft and stay vigilant about cybersecurity threats to ensure the safety of their systems and data.

References

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2. VulDB. (n.d.). CVE-2023–36895: Microsoft Office Outlook Remote Code Execution. Read More [2]
3. NVD. (n.d.). CVE-2023–36895 Detail. Read More [3]
4. Microsoft Support. (n.d.). Description of the security update for Word 2016: August 8, 2023 (KB5002464). Read More [4]
5. CVE Mitre. (n.d.). CVE-2023–36895. Read More [5]
6. Rapid7. (n.d.). Microsoft Outlook Remote Code Execution Vulnerability. Read More [6]
7. Socradar. (2023, August 9). Microsoft’s August 2023 Patch Tuesday Fixes Six Critical Vulnerabilities and Two Exploited Zero-Days. Read More [7]
8. Anoop C Nair. (2023, August 16). Fixes For 6 Exchange Server Vulnerabilities Released In August. Read More [8]
9. eSecurityPlanet. (2023, August 9). Patch Tuesday Targets 74 Flaws, Including Microsoft. Read More [9]