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Date: Mon, 06 Apr 2015 15:25:51 +0200
From: Gsunde Orangen <>
Subject: Re: Advisory: CVE-2014-9708: Appweb Web Server

Thanks, Matthew, for having spotted this.
As only current versions of Appweb (4 & 5) have been addressed so far,
but legacy versions (see were
not mentioned yet in :

- Appweb V3: vulnerable, too
-- Source code audit on Appweb 3.4.2:
The vulnerable code is not in the parseRange() function in
paks/http/httpLib.c, but similarly in http/request.c
-- Verified as vulnerable using a device with Appweb 3.4.1

- Appweb V2: not vulnerable
-- Source code audit on Appweb 2.4.4:
V2 was writtein in C++ (not C), the Range parser is in request.cpp and
handles invalid ranges correctly
-- Verified as not vulnerable using a device with Appweb 2.3.1


On 2015-03-28, 03:40 Matthew Daley wrote:
> Affected software: Appweb Web Server
> CVE ID: CVE-2014-9708
> Description: An HTTP request with a Range header of the form "Range:
> x=," (ie. with an empty range value) will cause a null pointer
> dereference, leading to a remotely-triggerable DoS.
> Fixed versions: 4.6.6, 5.2.1
> Bug entry:
> Fix:
> Reported by: Matthew Daley
> - Matthew Daley

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