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Red Hat Security Advisory 2016-1205-01

Red Hat Security Advisory 2016-1205-01
Posted Jun 7, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1205-01 - The Simple Protocol for Independent Computing Environments is a remote display system built for virtual environments which allows the user to view a computing 'desktop' environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. Security Fix: A memory allocation flaw, leading to a heap-based buffer overflow, was found in spice's smartcard interaction, which runs under the QEMU-KVM context on the host. A user connecting to a guest VM using spice could potentially use this flaw to crash the QEMU-KVM process or execute arbitrary code with the privileges of the host's QEMU-KVM process.

tags | advisory, remote, overflow, arbitrary, protocol
systems | linux, redhat
advisories | CVE-2016-0749, CVE-2016-2150
SHA-256 | 930d98110860d2796a0f946db501717e8f5099ba8c04b6a1c80beecc2f3cfbaa

Red Hat Security Advisory 2016-1205-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: spice security update
Advisory ID: RHSA-2016:1205-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:1205
Issue date: 2016-06-06
CVE Names: CVE-2016-0749 CVE-2016-2150
=====================================================================

1. Summary:

An update for spice 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

The Simple Protocol for Independent Computing Environments (SPICE) is a
remote display system built for virtual environments which allows the user
to view a computing 'desktop' environment not only on the machine where it
is running, but from anywhere on the Internet and from a wide variety of
machine architectures.

Security Fix(es):

* A memory allocation flaw, leading to a heap-based buffer overflow, was
found in spice's smartcard interaction, which runs under the QEMU-KVM
context on the host. A user connecting to a guest VM using spice could
potentially use this flaw to crash the QEMU-KVM process or execute
arbitrary code with the privileges of the host's QEMU-KVM process.
(CVE-2016-0749)

* A memory access flaw was found in the way spice handled certain guests
using crafted primary surface parameters. A user in a guest could use this
flaw to read from and write to arbitrary memory locations on the host.
(CVE-2016-2150)

The CVE-2016-0749 issue was discovered by Jing Zhao (Red Hat) and the
CVE-2016-2150 issue was discovered by Frediano Ziglio (Red Hat).

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

Applications acting as a SPICE server must be restarted for this update to
take effect. Note that QEMU-KVM guests providing SPICE console access must
be restarted for this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1300646 - CVE-2016-0749 spice: heap-based memory corruption within smartcard handling
1313496 - CVE-2016-2150 spice: Host memory access from guest with invalid primary surface parameters

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
spice-0.12.4-15.el7_2.1.src.rpm

x86_64:
spice-debuginfo-0.12.4-15.el7_2.1.x86_64.rpm
spice-server-0.12.4-15.el7_2.1.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
spice-debuginfo-0.12.4-15.el7_2.1.x86_64.rpm
spice-server-devel-0.12.4-15.el7_2.1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

Source:
spice-0.12.4-15.el7_2.1.src.rpm

x86_64:
spice-debuginfo-0.12.4-15.el7_2.1.x86_64.rpm
spice-server-0.12.4-15.el7_2.1.x86_64.rpm
spice-server-devel-0.12.4-15.el7_2.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
spice-0.12.4-15.el7_2.1.src.rpm

x86_64:
spice-debuginfo-0.12.4-15.el7_2.1.x86_64.rpm
spice-server-0.12.4-15.el7_2.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

x86_64:
spice-debuginfo-0.12.4-15.el7_2.1.x86_64.rpm
spice-server-devel-0.12.4-15.el7_2.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
spice-0.12.4-15.el7_2.1.src.rpm

x86_64:
spice-debuginfo-0.12.4-15.el7_2.1.x86_64.rpm
spice-server-0.12.4-15.el7_2.1.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
spice-debuginfo-0.12.4-15.el7_2.1.x86_64.rpm
spice-server-devel-0.12.4-15.el7_2.1.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2016-0749
https://access.redhat.com/security/cve/CVE-2016-2150
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2016 Red Hat, Inc.
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