Several vulnerabilities were discovered in qemu, a fast processor emulator. The Common Vulnerabilities and Exposures project identifies the following problems :

CVE-2017-2615

The Cirrus CLGD 54xx VGA Emulator in qemu 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 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.

CVE-2017-2620

The Cirrus CLGD 54xx VGA Emulator in qemu is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data in cirrus_bitblt_cputovideo.

A privileged user inside 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.

CVE-2017-5898

The CCID Card device emulator support is vulnerable to an integer overflow flaw. It could occur while passing message via command/responses packets to and from the host.

A privileged user inside guest could use this flaw to crash the Qemu process on host resulting in DoS.

CVE-2017-5973

The USB xHCI controller emulator support in qemu is vulnerable to an infinite loop issue. It could occur while processing control transfer descriptors' sequence in xhci_kick_epctx.

A privileged user inside guest could use this flaw to crash the Qemu process resulting in DoS.

This update also updates the fix CVE-2016-9921 since it was too strict and broke certain guests.

For Debian 7 'Wheezy', these problems have been fixed in version 1.1.2+dfsg-6+deb7u20.

We recommend that you upgrade your qemu packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An update for qemu-kvm is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM.

Security Fix(es) :

* 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. (CVE-2017-2615)

* 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 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. (CVE-2017-2620)

Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang (360.cn Inc.) for reporting CVE-2017-2615.

Bug Fix(es) :

* When using the virtio-blk driver on a guest virtual machine with no space on the virtual hard drive, the guest terminated unexpectedly with a 'block I/O error in device' message and the qemu-kvm process exited with a segmentation fault. This update fixes how the system_reset QEMU signal is handled in the above scenario. As a result, if a guest crashes due to no space left on the device, qemu-kvm continues running and the guest can be reset as expected.
(BZ#1420049)

An update for kvm is now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware. Using KVM, one can run multiple virtual machines running unmodified Linux or Windows images. Each virtual machine has private virtualized hardware: a network card, disk, graphics adapter, etc.

Security Fix(es) :

* 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. (CVE-2017-2615)

* 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 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. (CVE-2017-2620)

Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang (360.cn Inc.) for reporting CVE-2017-2615.

This update for qemu fixes several issues. These security issues were fixed :

  - CVE-2017-2620: In CIRRUS_BLTMODE_MEMSYSSRC mode the     bitblit copy routine cirrus_bitblt_cputovideo failed to     check the memory region, allowing for an out-of-bounds     write that allows for privilege escalation (bsc#1024972)

  - CVE-2017-2615: An error in the bitblt copy operation     could have allowed a malicious guest administrator to     cause an out of bounds memory access, possibly leading     to information disclosure or privilege escalation     (bsc#1023004)

  - CVE-2017-5856: The MegaRAID SAS 8708EM2 Host Bus Adapter     emulation support was vulnerable to a memory leakage     issue allowing a privileged user to leak host memory     resulting in DoS (bsc#1023053)

  - CVE-2016-9776: The ColdFire Fast Ethernet Controller     emulator support was vulnerable to an infinite loop     issue while receiving packets in 'mcf_fec_receive'. A     privileged user/process inside guest could have used     this issue to crash the Qemu process on the host leading     to DoS (bsc#1013285)

  - CVE-2016-9911: The USB EHCI Emulation support was     vulnerable to a memory leakage issue while processing     packet data in 'ehci_init_transfer'. A guest     user/process could have used this issue to leak host     memory, resulting in DoS for the host (bsc#1014111)

  - CVE-2016-9907: The USB redirector usb-guest support was     vulnerable to a memory leakage flaw when destroying the     USB redirector in 'usbredir_handle_destroy'. A guest     user/process could have used this issue to leak host     memory, resulting in DoS for a host (bsc#1014109)

  - CVE-2016-9921: The Cirrus CLGD 54xx VGA Emulator support     was vulnerable to a divide by zero issue while copying     VGA data. A privileged user inside guest could have used     this flaw to crash the process instance on the host,     resulting in DoS (bsc#1014702)

  - CVE-2016-9922: The Cirrus CLGD 54xx VGA Emulator support     was vulnerable to a divide by zero issue while copying     VGA data. A privileged user inside guest could have used     this flaw to crash the process instance on the host,     resulting in DoS (bsc#1014702)

  - CVE-2016-10155: The virtual hardware watchdog     'wdt_i6300esb' was vulnerable to a memory leakage issue     allowing a privileged user to cause a DoS and/or     potentially crash the Qemu process on the host     (bsc#1021129)

  - CVE-2017-5526: The ES1370 audio device emulation support     was vulnerable to a memory leakage issue allowing a     privileged user inside the guest to cause a DoS and/or     potentially crash the Qemu process on the host     (bsc#1020589)

  - CVE-2017-5525: The ac97 audio device emulation support     was vulnerable to a memory leakage issue allowing a     privileged user inside the guest to cause a DoS and/or     potentially crash the Qemu process on the host     (bsc#1020491)

  - CVE-2017-5667: The SDHCI device emulation support was     vulnerable to an OOB heap access issue allowing a     privileged user inside the guest to crash the Qemu     process resulting in DoS or potentially execute     arbitrary code with privileges of the Qemu process on     the host (bsc#1022541)

  - CVE-2017-5898: The CCID Card device emulator support was     vulnerable to an integer overflow allowing a privileged     user inside the guest to crash the Qemu process     resulting in DoS (bnc#1023907)

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2017-0454 advisory.

    - kvm-cirrus-fix-oob-access-issue-CVE-2017-2615.patch [bz#1421564]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for qemu fixes several issues. These security issues were fixed :

  - CVE-2017-5898: The CCID Card device emulator support was     vulnerable to an integer overflow flaw allowing a     privileged user to crash the Qemu process on the host     resulting in DoS (bsc#1023907).

  - CVE-2017-5857: The Virtio GPU Device emulator support     was vulnerable to a host memory leakage issue allowing a     guest user to leak host memory resulting in DoS     (bsc#1023073).

  - CVE-2017-2620: In CIRRUS_BLTMODE_MEMSYSSRC mode the     bitblit copy routine cirrus_bitblt_cputovideo failed to     check the memory region, allowing for an out-of-bounds     write that allows for privilege escalation (bsc#1024972)

  - CVE-2017-2615: An error in the bitblt copy operation     could have allowed a malicious guest administrator to     cause an out of bounds memory access, possibly leading     to information disclosure or privilege escalation     (bsc#1023004)

  - CVE-2017-5856: The MegaRAID SAS 8708EM2 Host Bus Adapter     emulation support was vulnerable to a memory leakage     issue allowing a privileged user to leak host memory     resulting in DoS (bsc#1023053)

  - CVE-2016-9921: The Cirrus CLGD 54xx VGA Emulator support     was vulnerable to a divide by zero issue while copying     VGA data. A privileged user inside guest could have used     this flaw to crash the process instance on the host,     resulting in DoS (bsc#1014702)

  - CVE-2016-9922: The Cirrus CLGD 54xx VGA Emulator support     was vulnerable to a divide by zero issue while copying     VGA data. A privileged user inside guest could have used     this flaw to crash the process instance on the host,     resulting in DoS (bsc#1014702)

  - CVE-2016-10029: The Virtio GPU Device emulator support     was vulnerable to an OOB read issue allowing a guest     user to crash the Qemu process instance resulting in Dos     (bsc#1017081).

  - CVE-2016-10028: The Virtio GPU Device emulator support     was vulnerable to an out of bounds memory access issue     allowing a guest user to crash the Qemu process instance     on a host, resulting in DoS (bsc#1017084).

  - CVE-2016-10155: The virtual hardware watchdog     'wdt_i6300esb' was vulnerable to a memory leakage issue     allowing a privileged user to cause a DoS and/or     potentially crash the Qemu process on the host     (bsc#1021129)

  - CVE-2017-5552: The Virtio GPU Device emulator support     was vulnerable to a memory leakage issue allowing a     guest user to leak host memory resulting in DoS     (bsc#1021195).

  - CVE-2017-5578: The Virtio GPU Device emulator support     was vulnerable to a memory leakage issue allowing a     guest user to leak host memory resulting in DoS     (bsc#1021481).

  - CVE-2017-5526: The ES1370 audio device emulation support     was vulnerable to a memory leakage issue allowing a     privileged user inside the guest to cause a DoS and/or     potentially crash the Qemu process on the host     (bsc#1020589).

  - CVE-2017-5525: The ac97 audio device emulation support     was vulnerable to a memory leakage issue allowing a     privileged user inside the guest to cause a DoS and/or     potentially crash the Qemu process on the host     (bsc#1020491).

  - CVE-2017-5667: The SDHCI device emulation support was     vulnerable to an OOB heap access issue allowing a     privileged user inside the guest to crash the Qemu     process resulting in DoS or potentially execute     arbitrary code with privileges of the Qemu process on     the host (bsc#1022541).

  - CVE-2017-5898: The CCID Card device emulator support was     vulnerable to an integer overflow allowing a privileged     user inside the guest to crash the Qemu process     resulting in DoS (bnc#1023907)

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several vulnerabilities were discovered in qemu-kvm, a full virtualization solution for Linux hosts on x86 hardware with x86 guests.

CVE-2017-2615

The Cirrus CLGD 54xx VGA Emulator in qemu-kvm 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 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-kvm process on the host.

CVE-2017-2620

The Cirrus CLGD 54xx VGA Emulator in qemu-kvm is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data in cirrus_bitblt_cputovideo.

A privileged user inside 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-kvm process on the host.

CVE-2017-5898

The CCID Card device emulator support is vulnerable to an integer overflow flaw. It could occur while passing message via command/responses packets to and from the host.

A privileged user inside guest could use this flaw to crash the qemu-kvm process on the host resulting in a DoS.

This issue does not affect the qemu-kvm binaries in Debian but we apply the patch to the sources to stay in sync with the qemu package.

CVE-2017-5973

The USB xHCI controller emulator support in qemu-kvm is vulnerable to an infinite loop issue. It could occur while processing control transfer descriptors' sequence in xhci_kick_epctx.

A privileged user inside guest could use this flaw to crash the qemu-kvm process resulting in a DoS.

This update also updates the fix CVE-2016-9921 since it was too strict and broke certain guests.

For Debian 7 'Wheezy', these problems have been fixed in version 1.1.2+dfsg-6+deb7u20.

We recommend that you upgrade your qemu-kvm packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
97473	Debian DLA-845-1 : qemu security update	Nessus	Debian Local Security Checks	3/2/2017	6/3/2021	critical
97528	CentOS 7 : qemu-kvm (CESA-2017:0396)	Nessus	CentOS Local Security Checks	3/6/2017	6/3/2021	critical
97594	RHEL 5 : kvm (RHSA-2017:0454)	Nessus	Red Hat Local Security Checks	3/8/2017	10/24/2019	critical
100149	SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2017:1241-1)	Nessus	SuSE Local Security Checks	5/12/2017	6/3/2021	critical
97593	Oracle Linux 5 : kvm (ELSA-2017-0454)	Nessus	Oracle Linux Local Security Checks	3/8/2017	10/23/2024	critical
97599	SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2017:0625-1)	Nessus	SuSE Local Security Checks	3/8/2017	6/3/2021	critical
97439	Debian DLA-842-1 : qemu-kvm security update	Nessus	Debian Local Security Checks	3/1/2017	6/3/2021	critical

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