CVE-2015-3247

Updated spice packages fix security vulnerability:

A race condition flaw, leading to a heap-based memory corruption, was found in spice's worker_update_monitors_config() function, which runs under the QEMU-KVM context on the host. A user in a guest could leverage this flaw to crash the host QEMU-KVM process or, possibly, execute arbitrary code with the privileges of the host QEMU-KVM process (CVE-2015-3247).

These are all security issues fixed in the libspice-server-devel-0.12.8-2.1 package on the GA media of openSUSE Tumbleweed.

Spice was updated to fix three security issues.

The following vulnerabilities were fixed:

• CVE-2015-3247: heap corruption in the spice server (bsc#944460)
• CVE-2015-5261: Guest could have accessed host memory using crafted images (bsc#948976)
• CVE-2015-5260: Insufficient validation of surface_id parameter could have caused a crash (bsc#944460)

Spice was updated to fix three security issues.

The following vulnerabilities were fixed:

• CVE-2015-3247: heap corruption in the spice server (bsc#944460)
• CVE-2015-5261: Guest could have accessed host memory using crafted images (bsc#948976)
• CVE-2015-5260: Insufficient validation of surface_id parameter could have caused a crash (bsc#944787)

Race condition in the worker_update_monitors_config function in SPICE 0.12.4 allows a remote authenticated guest user to cause a denial of service (heap-based memory corruption and QEMU-KVM crash) or possibly execute arbitrary code on the host via unspecified vectors.

Frediano Ziglio discovered that Spice incorrectly handled monitor configs. A malicious guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile.