A flaw was found in Dia's Network Bus object loader. When opening a crafted Dia project (.dia) file, the bushandles attribute supplies numhandles without validation. Later, when a bus handle is moved, bushandlemoved() allocates two arrays on the stack using galloca() sized by numhandles, which can exhaust the thread stack and cause memory corruption, application crash, or potentially arbitrary code execution. The same galloca pattern exists in objects/Misc/tree.c.

Untrusted search path vulnerability in dia's Python plug-in alows local users to execute arbitrary code via a Trojan horse Python file in the current working directory, related to an erroneous setting of sys.path by the PySysSetArgv function.

References: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504251

Test case and more discussion about this issue (and reason's why it can't be fixed in Python is available at): http://www.nabble.com/Bug-484305%3A-bicyclerepair%3A-bike.vim-imports-untrusted-python-files-from-cwd-td18848099.html

Proposed patch: http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=pythonpath.diff;att=1;bug=504251

Missing about:blank indicator in custom-sized new windows in Dia before 1.9.0 on macOS could allow an attacker to spoof a trusted domain in the window title and mislead users about the current site.

The Python SVG import plugin (diasvgimport.py) for DIA 0.94 and earlier allows user-assisted attackers to execute arbitrary commands via a crafted SVG file.

Multiple unspecified format string vulnerabilities in Dia have unspecified impact and attack vectors, a different set of issues than CVE-2006-2480.

Format string vulnerability in Dia 0.94 allows user-assisted attackers to cause a denial of service (crash) and possibly execute arbitrary code by triggering errors or warnings, as demonstrated via format string specifiers in a .bmp filename. NOTE: the original exploit was demonstrated through a command line argument, but there are other mechanisms for input that are automatically processed by Dia, such as a crafted .dia file.

Multiple buffer overflows in the xfig import code (xfig-import.c) in Dia 0.87 and later before 0.95-pre6 allow user-assisted attackers to have an unknown impact via a crafted xfig file, possibly involving an invalid (1) color index, (2) number of points, or (3) depth.

Multiple unspecified vulnerabilities in Dia before 0.96.1-6 have unspecified attack vectors and impact, probably involving the use of vulnerable FreeType libraries that contain CVE-2007-2754 and/or CVE-2007-1351.