full-disclosure - Possible Python 2.3 DoS Vulnerability

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

From: nd at perlig.de (André Malo)
Subject: Possible Python 2.3 DoS Vulnerability

* Jack Shell wrote:

> Problem:
> Seems harmless right? Well, if someone was to send a request of
> "\x1a\x09" or with "\x1a\x09" at the end to a server/client running on
> a Python 2.3 platform, it could cause a denial of service.
>
> POC?:
> I tested this out by sending "GET \x1a\x09 HTTP/1.0\r\n" to the
> BaseHTTPServer included in the python libs directory and it FREAKED at
> the GET request and disconnected me. AND, when I tried to end the
> server with the interupt key, I had to press it several times for
> about two minutes.

(Without a Win32 available for a test)
The -u command line switch should resolve that issue.

nd
-- 
my @japh = (sub{q~Just~},sub{q~Another~},sub{q~Perl~},sub{q~Hacker~});
my $japh = q[sub japh { }]; print join       #########################
 [ $japh =~ /{(.)}/] -> [0] => map $_ -> ()  #            Andr? Malo #
=> @japh;                                    # http://pub.perlig.de/ #