FreeType Multilpe Vulnerabilities

Multiple vulnerabilities have been identified in FreeType, which can be exploited by malicious people to potentially compromise an application using the library.

1. An error in src/type1/t1parse.c when processing dictionaries can be exploited to cause heap-based memory corruption via a specially crafted Type1 font file.
2. An error in src/bdf/bdflib.c when processing the encoding field can be exploited to cause heap-based memory corruption via a specially crafted Bitmap Distribution Format (BDF) font file.
3. An error in src/winfonts/winfnt.c when processing the number of glyphs can be exploited to cause heap-based memory corruption via a specially crafted TrueType font file.
4. An error in src/truetype/ttgload.c when handling the zone2 pointer point can be exploited to cause heap-based memory corruption via a specially crafted TrueType font file.
5. An error in src/bdf/bdflib.c when processing negative encoding values can be exploited to cause heap-based memory corruption via a specially crafted Bitmap Distribution Format (BDF) font file.

Successful exploitation of the vulnerabilities may allow execution of arbitrary code.