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TITLE:
t1lib "token()" and "linetoken()" Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA43491

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43491/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43491

RELEASE DATE:
2011-03-13

DISCUSS ADVISORY:
http://secunia.com/advisories/43491/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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http://secunia.com/advisories/43491/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=43491

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Some vulnerabilities have been discovered 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

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

SOLUTION:
Do not open untrusted AFM font files in an application using the
library.

PROVIDED AND/OR DISCOVERED BY:
1) Originally reported in Evince by Jon Larimer, IBM X-Force.
2) Originally reported in Evince by rock-madrid.

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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