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W3C Libwww Two Denial of Service Vulnerabilities

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Release Date:  2005-10-13    Last Update:  2009-10-29    Views:  11,599

Secunia Advisory SA17119

Where:

From remote

Impact:

DoS

Solution Status:

Unpatched

Software:

CVE Reference(s):

Description


Two vulnerabilities have been reported in W3C Libwww, which potentially can be exploited by malicious people to cause a DoS (Denial of Service).

1) A boundary error exists in the "HTBoundary_put_block()" function when processing multipart MIME data. This can 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.

2) An error in the included Expat XML Parser library can be exploited to cause a crash.

For more information:
SA36425

The vulnerabilities are reported in version 5.4.0. Other versions may also be affected.


Solution:
Restrict use to process multipart MIME data from trusted sources only. Do not process untrusted XML content using the library.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Sam Varshavchik

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

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: W3C Libwww Two Denial of Service Vulnerabilities

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