TITLE:
LibVC "count_vcards()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA19295

VERIFY ADVISORY:
http://secunia.com/advisories/19295/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
LibVC
http://secunia.com/product/8950/

DESCRIPTION:
trew has discovered a vulnerability in LibVC, which potentially can
be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error in the
"count_vcards()" function in vc.c when reading lines from an input
vcard (.vcf) file. This can be exploited to cause a stack-based
buffer overflow via overly long lines in a vcard file and may allow
arbitrary code execution.

Successful exploitation requires that the library is used to parse a
malicious vcard (.vcf) file.

The vulnerability has been confirmed in version 003. Other versions
may also be affected.

Note: The library may be used by other applications as a shared
library e.g. Rolo.

SOLUTION:
Do not use to library to parse vcard files from untrusted sources.

PROVIDED AND/OR DISCOVERED BY:
trew

ORIGINAL ADVISORY:
http://osvdb.org/ref/23/23985-libvc.txt

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