Mozilla Foundation reports:
Security researcher Holger Fuhrmannek and Mozilla
security engineer Tyson Smith reported a number of security
vulnerabilities in the Graphite 2 library affecting version
1.3.5.
The issue reported by Holger Fuhrmannek is a mechanism to
induce stack corruption with a malicious graphite font. This
leads to a potentially exploitable crash when the font is
loaded.
Tyson Smith used the Address Sanitizer tool in concert with
a custom software fuzzer to find a series of uninitialized
memory, out-of-bounds read, and out-of-bounds write errors
when working with fuzzed graphite fonts.
Security researcher James Clawson used the Address
Sanitizer tool to discover an out-of-bounds write in the
Graphite 2 library when loading a crafted Graphite font
file. This results in a potentially exploitable crash.