TITLE:
cURL/libcURL TFTP Protocol URL Parsing Buffer Overflow

SECUNIA ADVISORY ID:
SA19271

VERIFY ADVISORY:
http://secunia.com/advisories/19271/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
cURL 7.x
http://secunia.com/product/4691/

DESCRIPTION:
Ulf Harnhammar has reported a vulnerability in cURL/libcURL, which
potentially can be exploited by malicious people to compromise a
user's system.

The vulnerability is caused due to a boundary error within the
parsing of a URL that contains the TFTP protocol prefix "tftp://".
This can be exploited to cause a heap-based buffer overflow via a
specially-crafted URL that consist of a valid hostname and a path
that is longer than 512 bytes.

Successful exploitation requires that the user is e.g. tricked into
using cURL with a specially-crafted URL or to use cURL with a HTTP
server that redirects to a malicious tftp URL.

The vulnerability has been reported in versions 7.15.0 through
7.15.2.

SOLUTION:
Update to version 7.15.3.
http://curl.haxx.se/download.html

PROVIDED AND/OR DISCOVERED BY:
Ulf Harnhammar

ORIGINAL ADVISORY:
http://curl.haxx.se/docs/adv_20060320.html

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