CVE-2021-39823 : Security Advisory and Response

Adobe svg-native-viewer 8182d14dfad5d1e10f53ed830328d7d9a3cfa96d and earlier versions are affected by a heap buffer overflow vulnerability due to insecure handling of a malicious .svg file, potentially resulting in arbitrary code execution in the context of the current user. User interaction is required to exploit this vulnerability.

Understanding CVE-2021-39823

Adobe svg-native-viewer is susceptible to a heap buffer overflow vulnerability.

What is CVE-2021-39823?

The vulnerability in Adobe svg-native-viewer allows attackers to execute arbitrary code by exploiting an insecure handling of malicious .svg files, requiring user interaction for exploitation.

The Impact of CVE-2021-39823

The impact of this vulnerability includes:

CVSS Base Score: 7.8 (High)
Attack Complexity: Low
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
User Interaction: Required

Technical Details of CVE-2021-39823

Adobe svg-native-viewer's vulnerability details.

Vulnerability Description

The vulnerability is identified as a Heap-based Buffer Overflow (CWE-122).

Affected Systems and Versions

Product: SVG Native Viewer
Vendor: Adobe
Affected Versions:
Unspecified custom version <= 8182d14dfad5d1e10f53ed830328d7d9a3cfa96d
Unspecified custom version <= None

Exploitation Mechanism

The heap buffer overflow vulnerability is exploited by manipulating .svg files with malicious code, requiring user interaction for successful exploitation.

Mitigation and Prevention

Measures to mitigate and prevent the vulnerability.

Immediate Steps to Take

Adobe recommends updating to the latest version to mitigate the vulnerability.
Users should avoid opening untrusted .svg files.

Long-Term Security Practices

Regularly update software to the latest versions.
Educate users about the risks of opening unknown or suspicious files.

Patching and Updates

Apply security patches as soon as they are released by Adobe to address the vulnerability.