vapier 14/10/31 00:17:46 Added: qemu-2.1.2-vnc-sanitize-bits.patch Log: Add fix from upstream for vnc arg sanitizing #527088 by Agostino Sarubbo. (Portage version: 2.2.14/cvs/Linux x86_64, signed Manifest commit with key D2E96200)
Revision Changes Path 1.1 app-emulation/qemu/files/qemu-2.1.2-vnc-sanitize-bits.patch file : http://sources.gentoo.org/viewvc.cgi/gentoo-x86/app-emulation/qemu/files/qemu-2.1.2-vnc-sanitize-bits.patch?rev=1.1&view=markup plain: http://sources.gentoo.org/viewvc.cgi/gentoo-x86/app-emulation/qemu/files/qemu-2.1.2-vnc-sanitize-bits.patch?rev=1.1&content-type=text/plain Index: qemu-2.1.2-vnc-sanitize-bits.patch =================================================================== https://bugs.gentoo.org/527088 >From e6908bfe8e07f2b452e78e677da1b45b1c0f6829 Mon Sep 17 00:00:00 2001 From: Petr Matousek <[email protected]> Date: Mon, 27 Oct 2014 12:41:44 +0100 Subject: [PATCH] vnc: sanitize bits_per_pixel from the client bits_per_pixel that are less than 8 could result in accessing non-initialized buffers later in the code due to the expectation that bytes_per_pixel value that is used to initialize these buffers is never zero. To fix this check that bits_per_pixel from the client is one of the values that the rfb protocol specification allows. This is CVE-2014-7815. Signed-off-by: Petr Matousek <[email protected]> [ kraxel: apply codestyle fix ] Signed-off-by: Gerd Hoffmann <[email protected]> --- ui/vnc.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/ui/vnc.c b/ui/vnc.c index 0fe6eff..8bca597 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -2026,6 +2026,16 @@ static void set_pixel_format(VncState *vs, return; } + switch (bits_per_pixel) { + case 8: + case 16: + case 32: + break; + default: + vnc_client_error(vs); + return; + } + vs->client_pf.rmax = red_max; vs->client_pf.rbits = hweight_long(red_max); vs->client_pf.rshift = red_shift; -- 2.1.2
