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CVE-2018-15746

QEMU: seccomp: blacklist is not applied to all threads

qemu-seccomp.c in QEMU might allow local OS guest users to cause a denial of service (guest crash) by leveraging mishandling of the seccomp policy for threads other than the main thread.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Qemu Redhat
Products
Qemu Enterprise Linux Openstack and 1 more
CVE-2018-12617

Qemu: qemu-guest-agent: Integer overflow causes segmentation fault in qmp_guest_file_read()

qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.

CVSS 3.1 · 7.5 High EPSS 24.6% KEV · Not listed
Vendors
Canonical Debian Qemu
Products
Ubuntu Linux Debian Linux Qemu
CVE-2018-11806

QEMU: slirp: heap buffer overflow while reassembling fragmented datagrams

m_cat in slirp/mbuf.c in Qemu has a heap-based buffer overflow via incoming fragmented datagrams.

CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Qemu and 1 more
Products
Ubuntu Linux Debian Linux Qemu and 9 more
CVE-2018-10839

QEMU: ne2000: integer overflow leads to buffer overflow issue

Qemu emulator <= 3.0.0 built with the NE2000 NIC emulation support is vulnerable to an integer overflow, which could lead to buffer overflow issue. It could occur when receiving packets over the network. A user inside guest could use this flaw to crash the Qemu process resulting in DoS.

CVSS 3.0 · 6.5 Medium EPSS 3.1% KEV · Not listed
Vendors
Canonical Debian Qemu and 1 more
Products
Ubuntu Linux Debian Linux Qemu and 1 more
CVE-2017-7539

Qemu: qemu-nbd crashes due to undefined I/O coroutine

An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.

CVSS 3.0 · 5.3 Medium EPSS 5.5% KEV · Not listed
Vendors
Qemu Redhat
Products
Qemu Enterprise Linux Openstack and 1 more
CVE-2017-7471

Qemu: 9p: virtfs allows guest to change filesystem attributes on host

Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.

CVSS 3.1 · 9.0 Critical EPSS < 1% KEV · Not listed
Vendors
Qemu
Products
Qemu
CVE-2017-2633

Qemu: VNC: memory corruption due to unchecked resolution limit

An out-of-bounds memory access issue was found in Quick Emulator (QEMU) before 1.7.2 in the VNC display driver. This flaw could occur while refreshing the VNC display surface area in the 'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process.

CVSS 3.0 · 5.4 Medium EPSS 3.1% KEV · Not listed
Vendors
Qemu Redhat
Products
Qemu Enterprise Linux Enterprise Linux Desktop and 5 more
CVE-2017-2630

Qemu: nbd: oob stack write in client routine drop_sync

A stack buffer overflow flaw was found in the Quick Emulator (QEMU) before 2.9 built with the Network Block Device (NBD) client support. The flaw could occur while processing server's response to a 'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.

CVSS 3.0 · 5.5 Medium EPSS 2.6% KEV · Not listed
Vendors
Qemu Redhat
Products
Qemu Enterprise Linux
CVE-2017-2620

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

Quick emulator (QEMU) before 2.8 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 cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process.

CVSS 3.0 · 5.5 Medium EPSS 3.6% KEV · Not listed
Vendors
Citrix Debian Qemu and 2 more
Products
Xenserver Debian Linux Qemu and 9 more
CVE-2017-2615

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 potentially execute arbitrary code on the host with privileges of QEMU process on the host.

CVSS 3.0 · 5.5 Medium EPSS 3.6% KEV · Not listed
Vendors
Citrix Debian Qemu and 2 more
Products
Xenserver Debian Linux Qemu and 9 more
CVE-2017-18043

Qemu: integer overflow in ROUND_UP macro could result in DoS

Integer overflow in the macro ROUND_UP (n, d) in Quick Emulator (Qemu) allows a user to cause a denial of service (Qemu process crash).

CVSS 3.0 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Qemu
Products
Ubuntu Linux Debian Linux Qemu
CVE-2017-18030

Qemu: Out-of-bounds access in cirrus_invalidate_region routine

The cirrus_invalidate_region function in hw/display/cirrus_vga.c in Qemu allows local OS guest privileged users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors related to negative pitch.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Qemu
Products
Debian Linux Qemu
CVE-2017-15124

Qemu: memory exhaustion through framebuffer update request message in VNC server

VNC server implementation in Quick Emulator (QEMU) 2.11.0 and older was found to be vulnerable to an unbounded memory allocation issue, as it did not throttle the framebuffer updates sent to its client. If the client did not consume these updates, VNC server allocates growing memory to hold onto this data. A malicious remote VNC client could use this flaw to cause DoS to the server host.

CVSS 3.0 · 7.5 High EPSS 2.8% KEV · Not listed
Vendors
Qemu Redhat
Products
Qemu Enterprise Linux Openstack
CVE-2017-15119

qemu: DoS via large option request

The Network Block Device (NBD) server in Quick Emulator (QEMU) before 2.11 is vulnerable to a denial of service issue. It could occur if a client sent large option requests, making the server waste CPU time on reading up to 4GB per request. A client could use this flaw to keep the NBD server from serving other requests, resulting in DoS.

CVSS 3.0 · 5.8 Medium EPSS 3.3% KEV · Not listed
Vendors
Canonical Debian Qemu and 1 more
Products
Ubuntu Linux Debian Linux Qemu and 3 more
CVE-2017-15118

Qemu: stack buffer overflow in NBD server triggered via long export name

A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.

CVSS 3.0 · 8.3 High EPSS 11.9% KEV · Not listed
Vendors
Canonical Qemu Redhat
Products
Ubuntu Linux Qemu Enterprise Linux and 1 more
CVE-2016-9603

Qemu: cirrus: heap buffer overflow via vnc connection

A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

CVSS 3.0 · 5.5 Medium EPSS 4.4% KEV · Not listed
Vendors
Citrix Debian Qemu and 1 more
Products
Xenserver Debian Linux Qemu and 7 more
CVE-2016-9602

Qemu: 9p: virtfs allows guest to access host filesystem

Qemu before version 2.9 is vulnerable to an improper link following when built with the VirtFS. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.

CVSS 3.0 · 7.6 High EPSS 3.6% KEV · Not listed
Vendors
Debian Qemu
Products
Debian Linux Qemu
CVE-2015-6815

qemu: net: e1000: infinite loop issue

The process_tx_desc function in hw/net/e1000.c in QEMU before 2.4.0.1 does not properly process transmit descriptor data when sending a network packet, which allows attackers to cause a denial of service (infinite loop and guest crash) via unspecified vectors.

CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed
Vendors
Arista Canonical Fedoraproject and 4 more
Products
Eos Ubuntu Linux Fedora and 8 more
CVE-2015-5745

kernel: qemu buffer overflow in virtio-serial

Buffer overflow in the send_control_msg function in hw/char/virtio-serial-bus.c in QEMU before 2.4.0 allows guest users to cause a denial of service (QEMU process crash) via a crafted virtio control message.

CVSS 3.1 · 6.5 Medium EPSS 3.0% KEV · Not listed
Vendors
Arista Fedoraproject Qemu
Products
Eos Fedora Qemu
CVE-2015-5278

qemu: Infinite loop in ne2000_receive() function

The ne2000_receive function in hw/net/ne2000.c in QEMU before 2.4.0.1 allows attackers to cause a denial of service (infinite loop and instance crash) or possibly execute arbitrary code via vectors related to receiving packets.

CVSS 3.1 · 6.5 Medium EPSS 2.3% KEV · Not listed
Vendors
Arista Canonical Fedoraproject and 1 more
Products
Eos Ubuntu Linux Fedora and 1 more