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From: "Gerd Hoffmann" <kraxel@redhat.com>
To: Adam Dunlap <acdunlap@google.com>
Cc: devel@edk2.groups.io, Borislav Petkov <bp@alien8.de>,
	 Peter Gonda <pgonda@google.com>,
	Ard Biesheuvel <ardb+tianocore@kernel.org>,
	 Erdem Aktas <erdemaktas@google.com>,
	Jiewen Yao <jiewen.yao@intel.com>,
	 Michael Roth <michael.roth@amd.com>, Min Xu <min.m.xu@intel.com>,
	 Tom Lendacky <thomas.lendacky@amd.com>,
	Yuan Yu <yuanyu@google.com>
Subject: Re: [edk2-devel] [PATCH v2] OvmfPkg: Harden #VC instruction emulation somewhat (CVE-2024-25742)
Date: Tue, 23 Apr 2024 11:27:58 +0200	[thread overview]
Message-ID: <udultfhwlrnldvuawaljvqxwck3yt33bx5witppx5itmg3wwgd@rhv7i57odf5c> (raw)
In-Reply-To: <20240419182146.699506-1-acdunlap@google.com>

On Fri, Apr 19, 2024 at 11:21:46AM -0700, Adam Dunlap wrote:
> Ensure that when a #VC exception happens, the instruction at the
> instruction pointer matches the instruction that is expected given the
> error code. This is to mitigate the ahoi WeSee attack [1] that could
> allow hypervisors to breach integrity and confidentiality of the
> firmware by maliciously injecting interrupts. This change is a
> translated version of a linux patch e3ef461af35a ("x86/sev: Harden #VC
> instruction emulation somewhat")
> 
> [1] https://ahoi-attacks.github.io/wesee/
> 
> Cc: Borislav Petkov (AMD) <bp@alien8.de>
> Cc: Tom Lendacky <thomas.lendacky@amd.com>
> Signed-off-by: Adam Dunlap <acdunlap@google.com>

Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>

take care,
  Gerd



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  parent reply	other threads:[~2024-04-23  9:28 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-17 16:54 [edk2-devel] [PATCH] OvmfPkg: Harden #VC instruction emulation somewhat (CVE-2024-25742) Adam Dunlap via groups.io
2024-04-17 17:08 ` Ard Biesheuvel
2024-04-17 17:45   ` Adam Dunlap via groups.io
2024-04-18  8:03     ` Yao, Jiewen
2024-04-18 12:15 ` Gerd Hoffmann
2024-04-18 15:39   ` Adam Dunlap via groups.io
2024-04-18 15:43     ` Peter Gonda via groups.io
2024-04-19 11:31     ` Gerd Hoffmann
2024-04-19 14:56   ` Lendacky, Thomas via groups.io
2024-04-19 15:12 ` Lendacky, Thomas via groups.io
2024-04-19 17:39   ` Adam Dunlap via groups.io
2024-04-19 18:21     ` [edk2-devel] [PATCH v2] " Adam Dunlap via groups.io
2024-04-22 14:12       ` Lendacky, Thomas via groups.io
2024-04-23  9:27       ` Gerd Hoffmann [this message]
2024-04-24 16:27         ` Ard Biesheuvel

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