Array index error in the t42_parse_sfnts function in type42/t42parse.c in FreeType before 2.4.2 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via negative size values for certain strings in FontType42 font files, leading to a heap-based buffer overflow.

References

• https://nvd.nist.gov/vuln/detail/CVE-2010-2806
• https://bugs.launchpad.net/ubuntu/maverick/+source/freetype/+bug/617019
• https://bugzilla.redhat.com/show_bug.cgi?id=621980
• https://rhn.redhat.com/errata/RHSA-2010-0736.html
• https://rhn.redhat.com/errata/RHSA-2010-0737.html
• https://savannah.nongnu.org/bugs/?30656
• http://freetype.sourceforge.net/index2.html#release-freetype-2.4.2
• http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=c06da1ad34663da7b6fc39b030dc3ae185b96557
• http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
• http://lists.apple.com/archives/security-announce/2010//Nov/msg00003.html
• http://marc.info/?l=oss-security&m=128111955616772&w=2
• http://secunia.com/advisories/40816
• http://secunia.com/advisories/40982
• http://secunia.com/advisories/42314
• http://secunia.com/advisories/42317
• http://sourceforge.net/projects/freetype/files/freetype2/2.4.2/NEWS/view
• http://support.apple.com/kb/HT4435
• http://support.apple.com/kb/HT4456
• http://support.apple.com/kb/HT4457
• http://www.redhat.com/support/errata/RHSA-2010-0864.html
• http://www.securityfocus.com/bid/42285
• http://www.ubuntu.com/usn/USN-972-1
• http://www.vupen.com/english/advisories/2010/2018
• http://www.vupen.com/english/advisories/2010/2106
• http://www.vupen.com/english/advisories/2010/3045
• http://www.vupen.com/english/advisories/2010/3046
• https://access.redhat.com/errata/RHSA-2010:0736
• https://access.redhat.com/errata/RHSA-2010:0737
• https://access.redhat.com/errata/RHSA-2010:0864
• https://access.redhat.com/security/cve/CVE-2010-2806