Qemu: display: cirrus: potential arbitrary code execution via cirrus_bitblt_cputovideo

Quick emulator QEMU built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrusbitbltcputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute...

Qemu: display: cirrus: potential arbitrary code execution via cirrus_bitblt_cputovideo

Quick emulator QEMU built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrusbitbltcputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute...

Qemu: display: cirrus: oob access while doing bitblt copy backward mode

Quick emulator QEMU built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or...

Qemu: display: cirrus: oob access while doing bitblt copy backward mode

Quick emulator QEMU built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or...

Qemu: display: cirrus: potential arbitrary code execution via cirrus_bitblt_cputovideo

Quick emulator QEMU built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrusbitbltcputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute...

Qemu: display: cirrus: oob access while doing bitblt copy backward mode

Quick emulator QEMU built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or...

oob access in cirrus bitblt copy

ISSUE DESCRIPTION When doing bitblt copy backwards, qemu should negate the blit width. This avoids an oob access before the start of video memory. IMPACT A malicious guest administrator can cause an out of bounds memory access, leading to information disclosure or privilege escalation. VULNERABLE...

xen-tools -- oob access in cirrus bitblt copy

The Xen Project reports: When doing bitblt copy backwards, qemu should negate the blit width. This avoids an oob access before the start of video memory. A malicious guest administrator can cause an out of bounds memory access, possibly leading to information disclosure or privilege escalation...

UBUNTU-CVE-2017-2615

Quick emulator QEMU built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or...

CVE-2017-2615

Quick emulator QEMU built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or...

Microsoft Windows - Win32k!GreStretchBltInternal() Does Not Handle src dest

Microsoft Windows - Win32k!GreStretchBltInternal Does Not Handle src dest Microsoft Windows win32k!GreStretchBltInternal does not handle src == dest ---------------------------------------------------------------------------- A bitblt bit block transfer is used to copy one rectangular region of...

Microsoft Windows - Win32k!GreStretchBltInternal() Does Not Handle src == dest

Microsoft Windows win32k!GreStretchBltInternal does not handle src == dest ---------------------------------------------------------------------------- A bitblt bit block transfer is used to copy one rectangular region of screen to another, often performing a raster operation rop of some sort e.g...

USN-776-2: KVM regression

USN-776-1 fixed vulnerabilities in KVM. Due to an incorrect fix, a regression was introduced in Ubuntu 8.04 LTS that caused KVM to fail to boot virtual machines started via libvirt. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Avi Kivity discovered...

CVE-2008-4539

Heap-based buffer overflow in the Cirrus VGA implementation in 1 KVM before kvm-82 and 2 QEMU on Debian GNU/Linux and Ubuntu might allow local users to gain privileges by using the VNC console for a connection, aka the LGD-54XX "bitblt" heap overflow. NOTE: this issue exists because of an incorre...

CVE-2008-4539

The connected documents describe a heap-based buffer overflow in the Cirrus VGA emulator (hw/display/cirrus_vga.c) of QEMU, affecting versions prior to a certain fix. The CVE-2014-8106 entry specifies Cirrus VGA heap overflow in QEMU before 2.2.0 and notes it exists due to an incomplete fix for C...

CVE-2008-4539

Heap-based buffer overflow in the Cirrus VGA implementation in 1 KVM before kvm-82 and 2 QEMU on Debian GNU/Linux and Ubuntu might allow local users to gain privileges by using the VNC console for a connection, aka the LGD-54XX "bitblt" heap overflow. NOTE: this issue exists because of an incorre...

openoffice.org: EMF files parsing EMR_BITBLT record heap overflows

Integer overflow in OpenOffice.org before 2.4 allows remote attackers to cause a denial of service crash and possibly execute arbitrary code via an EMF file with a crafted EMRSTRETCHBLT record, which triggers a heap-based buffer overflow...

xen/qemu Cirrus LGD-54XX "bitblt" Heap Overflow

Multiple heap-based buffer overflows in the cirrusinvalidateregion function in the Cirrus VGA extension in QEMU 0.8.2, as used in Xen and possibly other products, might allow local users to execute arbitrary code via unspecified vectors related to "attempting to mark non-existent regions as dirty...

Heap overflow

Heap-based buffer overflow in the VGA device in Parallels allows local users, with root access to the guest operating system, to terminate the virtual machine and possibly execute arbitrary code in the host operating system via unspecified vectors related to bitblt operations...

CVE-2007-1320

Multiple heap-based buffer overflows in the cirrusinvalidateregion function in the Cirrus VGA extension in QEMU 0.8.2, as used in Xen and possibly other products, might allow local users to execute arbitrary code via unspecified vectors related to "attempting to mark non-existent regions as dirty...