t1lib Multiple Vulnerabilities

SA43491

CVE-2010-2642, CVE-2011-0433, CVE-2011-0764, CVE-2011-1552, CVE-2011-1553, CVE-2011-1554, CVE-2011-5244

24 Feb 2011

17 Dec 2012

Moderately Critical

Unpatched

t1lib 5.x

From remote

DoS (Denial of Service)

This includes vulnerabilities ranging from excessive resource consumption (e.g. causing a system to use a lot of memory) to crashing an application or an entire system.

System access

This covers vulnerabilities where malicious people are able to gain system access and execute arbitrary code with the privileges of a local user.

Some vulnerabilities have been reported in t1lib, which can be exploited by malicious people to compromise an application using the library.

1) A boundary error within the "token()" function in lib/t1lib/parseAFM.c can be exploited to cause a heap-based buffer overflow by tricking a user into processing a specially crafted AFM font file in an application using the library.

This is related to vulnerability #3 in:
SA42769

2) A boundary error within the "linetoken()" function in lib/t1lib/parseAFM.c can be exploited to cause a heap-based buffer overflow by tricking a user into processing a specially crafted AFM font file in an application using the library.

This is related to vulnerability #5 in:
SA42769

3) Errors within the "RLineTo()", "RRCurveTo()", and "RMoveTo()" functions (lib/type1/type1.c) can be exploited to e.g. cause a crash or corrupt memory.

The vulnerabilities are reported in version 5.1.2. Other versions may also be affected.

Do not process untrusted font files in an application using the library.

1) Originally reported in Evince by Jon Larimer, IBM X-Force.
2) Originally reported in Evince by rock-madrid.
3) Jonathan Brossard

Jonathan Brossard:
http://www.toucan-system.com/advisories/tssa-2011-01.txt