Qt 4.6.3 – ‘QSslSocketBackendPrivate::transmit()’ Denial of Service

• Exploit Database
• 116 阅读

• 作者： Luigi Auriemma
  日期： 2010-07-08
• 类别：

  • dos
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/14268/
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  Source: http://aluigi.org/adv/qtsslame-adv.txt   #######################################################################   Luigi Auriemma   Application: Qt http://qt.nokia.com Versions: <= 4.6.3 Platforms: Windows, Mac OS X, Linux, mobile devices Bug: QSSLsocket endless loop Exploitation: remote, versus server Date: 29 Jun 2010 Author: Luigi Auriemma e-mail: aluigi@autistici.org web: aluigi.org     #######################################################################     1) Introduction 2) Bug 3) The Code 4) Fix     #######################################################################   =============== 1) Introduction ===============     From vendor&apos;s website: "Qt is a cross-platform application and UI framework. Using Qt, you can write web-enabled applications once and deploy them across desktop, mobile and embedded operating systems without rewriting the source code."     #######################################################################   ====== 2) Bug ======     The part of the network library which handles the SSL connection can be tricked into an endless loop that freezes the whole application with CPU at 100%.   The problem is located in the QSslSocketBackendPrivate::transmit() function in src_network_ssl_qsslsocket_openssl.cpp that never exits from the main "while" loop.   Any application that acts as a server (and client, but has no security impact in this scenario) and uses SSL through the QSslSocket class is vulnerable and some examples are the Mumble server (Murmur), Multi-Computer Virtual Whiteboard and so on.     #######################################################################   =========== 3) The Code ===========   http://aluigi.org/poc/qtsslame.zip or https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/34227.zip (qtsslame.zip)     #######################################################################   ====== 4) Fix ======     No fix.     #######################################################################