CVE-2021-21098 : Security Advisory and Response

Adobe InDesign version 16.0 (and earlier) is affected by an Out-of-bounds Write vulnerability when parsing a crafted file. An unauthenticated attacker could leverage this vulnerability to achieve remote code execution in the context of the current user. This issue requires user interaction as the victim must open a malicious file.

Understanding CVE-2021-21098

Adobe InDesign software versions up to 16.0 are susceptible to a security flaw that allows remote attackers to execute arbitrary code on the target system.

What is CVE-2021-21098?

CVE-2021-21098 is a vulnerability in Adobe InDesign that arises due to an Out-of-bounds Write issue when processing specially crafted files. Attackers can exploit this to run malicious code remotely and compromise the user's system.

The Impact of CVE-2021-21098

The vulnerability has a High severity rating with a base score of 8.8 according to the CVSS v3.1 metrics. It poses a significant risk as it allows attackers to achieve remote code execution without requiring any privileges.

Technical Details of CVE-2021-21098

Adobe InDesign version 16.0 and earlier are affected by this vulnerability, leading to an Out-of-bounds Write scenario when handling specific file types.

Vulnerability Description

The vulnerability allows remote attackers to perform Out-of-bounds Write operations, enabling them to execute arbitrary code on the target system.

Affected Systems and Versions

Adobe InDesign versions less than or equal to 16.0 are affected by this issue, putting users of these versions at risk of exploitation.

Exploitation Mechanism

To exploit this vulnerability, an attacker needs to craft a malicious file and trick a user into opening it, thus triggering the code execution process.

Mitigation and Prevention

Organizations and users can take immediate steps to mitigate the risk posed by CVE-2021-21098.

Immediate Steps to Take

Users should refrain from opening files from untrusted sources, especially those received via suspicious emails or unknown origins. It is crucial to exercise caution when handling files from unfamiliar sources to prevent potential exploitation.

Long-Term Security Practices

Implementing security best practices such as keeping software up to date, utilizing security tools like antivirus programs, and educating users about phishing attacks can help enhance overall cybersecurity posture.

Patching and Updates

Adobe has released security updates to address this vulnerability. Users are advised to apply the necessary patches provided by the vendor to protect their systems from potential exploitation.