CVE-2021-26235: Null Pointer Dereference
First published: Thu Mar 18 2021(Updated: )
FastStone Image Viewer <= 7.5 is affected by a user mode write access violation near NULL at 0x005bdfc9, triggered when a user opens or views a malformed CUR file that is mishandled by FSViewer.exe. Attackers could exploit this issue for a Denial of Service (DoS) or possibly to achieve code execution.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FastStone Image Viewer | <=7.5 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for FastStone Image Viewer?
The vulnerability ID for FastStone Image Viewer is CVE-2021-26235.
What is the severity of CVE-2021-26235?
The severity of CVE-2021-26235 is high with a CVSS score of 7.8.
How does CVE-2021-26235 affect FastStone Image Viewer?
CVE-2021-26235 affects FastStone Image Viewer by causing a user mode write access violation near NULL, which can lead to a Denial of Service (DoS) or possibly code execution.
How can an attacker exploit CVE-2021-26235?
An attacker can exploit CVE-2021-26235 by providing a malformed CUR file that is mishandled by FSViewer.exe, resulting in a user mode write access violation.
Is there a fix available for CVE-2021-26235?
At the time of writing, there may not be a fix available for CVE-2021-26235. It is recommended to update to the latest version of FastStone Image Viewer or apply any patches or mitigations provided by the vendor.
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