TITLE:
GNU Binutils libbfd TekHex Record Handling Vulnerability

SECUNIA ADVISORY ID:
SA20188

VERIFY ADVISORY:
http://secunia.com/advisories/20188/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
GNU Binutils 2.x
http://secunia.com/product/10097/

DESCRIPTION:
Jesús Olmos Gonzalez has reported a vulnerability in GNU Binutils,
which can be exploited by malicious people to cause a DoS (Denial of
Service) and potentially to compromise a vulnerable system.

The vulnerability is caused due to an error in "bfd/tekhex.c" of the
libbfd library when processing a specially crafted file that contains
a Tektronix Hex Format (TekHex) record that contains a length value
which is not a valid hexadecimal character. This can be exploited to
cause a buffer overflow via a specially crafted file.

Successful exploitation crashes an application that uses the library
(e.g. strings) and may allow arbitrary code execution.

The vulnerability has been reported in version 2.16.1. Other versions
may also be affected.

SOLUTION:
Do not use the library to process files from untrusted sources.

PROVIDED AND/OR DISCOVERED BY:
Jesús Olmos Gonzalez

ORIGINAL ADVISORY:
http://sourceware.org/bugzilla/show_bug.cgi?id=2584

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