PT-2021-11859 · Faststone · Faststone Image Viewer

Dmitrymed · Published 2021-01-25 · Updated 2021-01-29 · CVE-2020-35844

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 version 7.5

Description: The issue is related to an out-of-bounds write that can occur when processing a crafted image file. This can happen at the location FSViewer.exe+0xbe9c4 in FastStone Image Viewer.

Recommendations: For FastStone Image Viewer version 7.5, consider avoiding the use of crafted image files until a patch is available. As a temporary workaround, restrict the opening of untrusted image files to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2020-35844

Affected Products

Faststone Image Viewer

References · 5

• 🔥 https://github.com/DmitryMeD/pentesting/blob/main/FastStone%20Image%20Viewer%207.5.md · Exploit
• https://osv.dev/vulnerability/CVE-2020-35844 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-35844 · Security Note
• https://twitter.com/DmitriyMelikov · Note
• https://t.me/cibsecurity/22610 · Telegram Post