eaa6ce4fe2
CVE-2017-5525: audio: memory leakage in ac97 (bz #1414110) CVE-2017-5526: audio: memory leakage in es1370 (bz #1414210) CVE-2016-10155 watchdog: memory leakage in i6300esb (bz #1415200) CVE-2017-5552: virtio-gpu-3d: memory leakage (bz #1415283) CVE-2017-5578: virtio-gpu: memory leakage (bz #1415797) CVE-2017-5667: sd: sdhci OOB access during multi block transfer (bz #1417560) CVE-2017-5856: scsi: megasas: memory leakage (bz #1418344) CVE-2017-5857: virtio-gpu-3d: host memory leakage in virgl_cmd_resource_unref (bz #1418383) CVE-2017-5898: usb: integer overflow in emulated_apdu_from_guest (bz #1419700) CVE-2017-5987: sd: infinite loop issue in multi block transfers (bz #1422001) CVE-2017-6058: vmxnet3: OOB access when doing vlan stripping (bz #1423359) CVE-2017-6505: usb: an infinite loop issue in ohci_service_ed_list (bz #1429434) CVE-2017-2615: cirrus: oob access while doing bitblt copy backward (bz #1418206) CVE-2017-2620: cirrus: potential arbitrary code execution (bz #1425419) Fix spice GL with new mesa/libglvnd (bz #1431905)
47 lines
1.5 KiB
Diff
47 lines
1.5 KiB
Diff
From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Wed, 8 Feb 2017 11:18:36 +0100
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Subject: [PATCH] cirrus: add blit_is_unsafe call to cirrus_bitblt_cputovideo
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(CVE-2017-2620)
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CIRRUS_BLTMODE_MEMSYSSRC blits do NOT check blit destination
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and blit width, at all. Oops. Fix it.
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Security impact: high.
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The missing blit destination check allows to write to host memory.
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Basically same as CVE-2014-8106 for the other blit variants.
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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(cherry picked from commit 92f2b88cea48c6aeba8de568a45f2ed958f3c298)
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---
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hw/display/cirrus_vga.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c
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index 0e47cf8..a093dc8 100644
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--- a/hw/display/cirrus_vga.c
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+++ b/hw/display/cirrus_vga.c
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@@ -899,6 +899,10 @@ static int cirrus_bitblt_cputovideo(CirrusVGAState * s)
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{
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int w;
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+ if (blit_is_unsafe(s, true)) {
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+ return 0;
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+ }
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+
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s->cirrus_blt_mode &= ~CIRRUS_BLTMODE_MEMSYSSRC;
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s->cirrus_srcptr = &s->cirrus_bltbuf[0];
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s->cirrus_srcptr_end = &s->cirrus_bltbuf[0];
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@@ -924,6 +928,10 @@ static int cirrus_bitblt_cputovideo(CirrusVGAState * s)
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}
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s->cirrus_srccounter = s->cirrus_blt_srcpitch * s->cirrus_blt_height;
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}
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+
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+ /* the blit_is_unsafe call above should catch this */
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+ assert(s->cirrus_blt_srcpitch <= CIRRUS_BLTBUFSIZE);
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+
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s->cirrus_srcptr = s->cirrus_bltbuf;
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s->cirrus_srcptr_end = s->cirrus_bltbuf + s->cirrus_blt_srcpitch;
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cirrus_update_memory_access(s);
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