PT-2021-16975 · Faststone · Faststone Image Viewer

Voidsec · Published 2021-03-18 · Updated 2021-03-22 · CVE-2021-26234

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions FastStone Image Viewer versions prior to 7.6

Description The issue arises from a user mode write access violation at 0x00402d8a when FSViewer.exe mishandles a malformed CUR file. This can occur when a user opens or views such a file. The exploitation of this issue could lead to a Denial of Service (DoS) or potentially allow for code execution.

Recommendations For FastStone Image Viewer versions prior to 7.6, update to version 7.6 or later to resolve the issue.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-26234

Affected Products

Faststone Image Viewer

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2021-26234 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26234 · Vendor Advisory
• https://voidsec.com/advisories/cve-2021-26234-faststone-image-viewer-v-7-5-user-mode-write-access-violation · Note