Date: Mon, 10 Aug 2020 12:18:07 +0300 From: Michael Tokarev <mjt@....msk.ru> To: oss-security@...ts.openwall.com, Mauro Matteo Cascella <mcascell@...hat.com> Cc: Alexander Bulekov <alxndr@...edu>, ziming zhang <ezrakiez@...il.com> Subject: Re: CVE-2020-16092 QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c 10.08.2020 11:25, Mauro Matteo Cascella wrote: > Hello, > > An assertion failure issue was found in QEMU in the network packet > processing component. This issue affects the "e1000e" and "vmxnet3" > network devices. This flaw allows a malicious guest user or process to > abort the QEMU process on the host, resulting in a denial of service > condition. > > Upstream patch: > -> https://git.qemu.org/?p=qemu.git;a=commit;h=035e69b063835a5fd23cacabd63690a3d84532a8 Hmm. Is it really worth the effort to treat these things as security issues? There are so many ways to crash a machine (be it virtual or hardware), there are definitely countless ways to crash things from within privileged code.. what's the security impact of a hardware issue when, say, a driver code in the OS does a stupid thing and the hardware locks up? Thanks, /mjt
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