Two vulnerabilities have been reported in Qemu, which can be exploited by malicious, local users in a guest virtual machine to potentially gain escalated privileges and malicious people to compromise a vulnerable system.
1) The vulnerability is caused due to a boundary error within the "process_tx_desc()" function (hw/e1000.c) when handling legacy mode packets while reading DMA requests. This can be exploited to cause a heap-based buffer overflow via a specially crafted packet.
2) The vulnerability is caused due to a boundary error within the "e1000_receive()" function (hw/e1000.c) when handling over-sized packets and can be exploited to cause a buffer overflow via a large packet.
Successful exploitation of this vulnerability requires "receiving large packets" option to be disabled in a guest virtual machine.
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Subject: Qemu Two Buffer Overflow Vulnerabilities
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