Vulnerabilities

FastStone Image Viewer GIF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FastStone Image Viewer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of GIF files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25145.

Unsafe Parsing of a PNG tRNS chunk in FastStone Image Viewer through 7.5 results in a stack buffer overflow.

FastStone Image Viewer <= 7.5 is affected by a user mode write access violation at 0x00402d7d, 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.

FastStone Image Viewer 7.5 has an out-of-bounds write (via a crafted image file) at FSViewer.exe+0xbe9c4.

FastStone Image Viewer 7.0 has a User Mode Write AV starting at image00400000+0x00000000001a9601.

FastStone Image Viewer 6.5 has a Read Access Violation on Block Data Move starting at image00400000+0x0000000000002d63 via a crafted image file.

FastStone Image Viewer 6.2 has a User Mode Read and Execute AV at 0x0057898e, triggered when the user opens a malformed JPEG file that is mishandled by FSViewer.exe. Attackers could exploit this issue for DoS (Access Violation) or possibly unspecified other impact.

FastStone Image Viewer 6.2 has a "User Mode Write AV" issue, possibly related to the jpeg_mem_term function in jmemnobs.c in libjpeg. This issue can be triggered by a malformed JPEG file that is mishandled by FSViewer.exe. Attackers could exploit this issue for DoS (Access Violation) or possibly unspecified other impact.

FastStone MaxView 3.0 and 3.1 allows user-assisted attackers to cause a denial of service (application crash) via a malformed BMP image with a crafted biSize field in the BITMAPINFOHEADER section.