An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c.

FontForge 20190801 has a use-after-free in SFD_GetFontMetaData in sfd.c.

FontForge 20190813 through 20190820 has a buffer overflow in PrefsUI_LoadPrefs in prefs.c.

uiutil.c in FontForge through 20170731 does not validate strings before launching the program specified by the BROWSER environment variable, which might allow remote attackers to conduct argument-injection attacks via a crafted URL, a different vulnerability than CVE-2017-17534.

FontForge 20161012 is vulnerable to a buffer over-read in ValidatePostScriptFontName (parsettf.c) resulting in DoS or code execution via a crafted otf file.

FontForge 20161012 is vulnerable to a buffer over-read in umodenc (parsettf.c) resulting in DoS or code execution via a crafted otf file.

FontForge 20161012 is vulnerable to a heap-based buffer overflow in readcffset (parsettf.c) resulting in DoS or code execution via a crafted otf file.

FontForge 20161012 is vulnerable to a stack-based buffer overflow in addnibble (parsettf.c) resulting in DoS or code execution via a crafted otf file.

FontForge 20161012 is vulnerable to a heap-based buffer over-read in readcfftopdicts (parsettf.c) resulting in DoS or code execution via a crafted otf file.