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Debian LTS Advisory ([SECURITY] [DLA 842-1] qemu-kvm security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
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.
Affected Software
Affected Software
qemu-kvm on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
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.