Bug 512684

Summary:	OpenJDK Font processing DoS vulnerability
Product:	[Other] Security Response	Reporter:	Marc Schoenefeld <mschoene>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aph, dbhole, patrickm, rruss, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-08-21 22:51:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Marc Schoenefeld 2009-07-20 11:40:00 UTC

A set of crash vulnerabilities in the OpenJDK font processing routines
have been detected. They crash the VM on F10 and F11, EL5 packages did not crash.  

To start the reproducer use: 

java FontFuzzRandom /usr/share/fonts/lohit-oriya/lohit_or.ttf


#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (nmethod.cpp:1851), pid=16913, tid=20683664
#  Error: guarantee(cont_offset != 0,"unhandled implicit exception in compiled c
ode")
#

or 

#  SIGSEGV (0xb) at pc=0x00f89a4d, pid=21610, tid=85552016
#
# JRE version: 6.0-b16
# Java VM: OpenJDK Client VM (14.0-b15 mixed mode linux-x86 )
# Distribution: Custom build (Thu Jul  9 14:26:35 EDT 2009)
# Problematic frame:
# J  java.lang.StringCoding$StringEncoder.encode([CII)[B


As font data can be supplied via untrusted client code, 
the parsing methods should be checked for proper behavior.