Wireshark-commits: [Wireshark-commits] rev 47676: /trunk/epan/dissectors/ /trunk/epan/dissectors/:
http://anonsvn.wireshark.org/viewvc/viewvc.cgi?view=rev&revision=47676
User: eapache
Date: 2013/02/15 09:32 AM
Log:
From Steve Magnani via https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=8264
Improve handling of truncated USB Configuration descriptors.
In contrast to other descriptor types, configuration descriptors have varying
lengths and may be quite long. This makes them much more prone to truncation
by a host that is cautious about reading large descriptors.
A real-world case has arisen where a host requests a partial configuration
descriptor of a USB webcam, and wireshark improperly reports that the response
is malformed.
Change configuration descriptor dissection to distinguish between truncation
induced by the host, which is not an error, and descriptor truncation or
reporting of invalid descriptor lengths by the device, which are.
This patch also relieves class-specific dissectors of the burden of checking
that the descriptor length and type fields are available, and that all the
bytes claimed by the descriptor length are also available.
Directory: /trunk/epan/dissectors/
Changes Path Action
+31 -25 packet-usb.c Modified
+1 -0 packet-usb.h Modified
