Russian security firm Intevydis has made a Windows exploit for a previously unknown security hole in Firefox 3.6 available to its customers. The exploit allows attackers to remotely gain control of a PC. Intevydis develops the commercial VulnDisco add-on for the also commercial Canvas exploit toolkit by vendor Immunity. On the Immunity forum, developer Evgeny Legerov praises his exploit for Windows XP (SP3) and Vista as being quite reliable. The developer says It was an interesting challenge to find the flaw – a buffer overflow – and to exploit it.

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