TITLE:
W3C Libwww Multipart MIME Data Handling Vulnerability

SECUNIA ADVISORY ID:
SA17119

VERIFY ADVISORY:
http://secunia.com/advisories/17119/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
W3C Libwww 5.x
http://secunia.com/product/5849/

DESCRIPTION:
Sam Varshavchik has reported a vulnerability in W3C Libwww, which
potentially can be exploited by malicious people to cause a DoS
(Denial of Service).

The vulnerability is caused due to a boundary error in the
"HTBoundary_put_block()" function when processing multipart MIME
data. This may be exploited to cause an illegal memory access past
the end of the input buffer via specially crafted multipart MIME
data. 

Successful exploitation can potentially cause an application that
uses Libwww to crash.

The vulnerability has been reported in version 5.4.0. Other versions
may also be affected.

SOLUTION:
Restrict use to process multipart MIME data from trusted sources
only.

Some Linux vendors have issued fixes.

PROVIDED AND/OR DISCOVERED BY:
Sam Varshavchik

ORIGINAL ADVISORY:
Red Hat Bugzilla:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=159597

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