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Alerts This Week
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Red Hat: RHSA-2023:1234-01 Critical: Spice-Server Buffer Vulnerabilities

red hat
Calendar Grey June 6, 2016
Scroller Redhat
Essential security patch for spice-server within Red Hat Enterprise Linux tackling severe memory vulnerabilities.
An update for spice-server is now available for Red Hat Enterprise Linux 6

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.

Summary

The Simple Protocol for Independent Computing Environments (SPICE) is a remote display protocol for virtual environments. SPICE users can access a virtualized desktop or server from the local system or any system with network access to the server. SPICE is used in Red Hat Enterprise Linux for viewing virtualized guests running on the Kernel-based Virtual Machine (KVM) hypervisor or on Red Hat Enterprise Virtualization Hypervisors.
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).

Topics%20covered

Topics Covered

security advisory security update buffer overflow Red Hat Enterprise Linux important memory access spice-server

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

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: spice-server-0.12.4-13.el6.1.src.rpm
x86_64: spice-server-0.12.4-13.el6.1.x86_64.rpm spice-server-debuginfo-0.12.4-13.el6.1.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
x86_64: spice-server-debuginfo-0.12.4-13.el6.1.x86_64.rpm spice-server-devel-0.12.4-13.el6.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: spice-server-0.12.4-13.el6.1.src.rpm
x86_64: spice-server-0.12.4-13.el6.1.x86_64.rpm spice-server-debuginfo-0.12.4-13.el6.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64: spice-server-debuginfo-0.12.4-13.el6.1.x86_64.rpm spice-server-devel-0.12.4-13.el6.1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source: spice-server-0.12.4-13.el6.1.src.rpm
x86_64: spice-server-0.12.4-13.el6.1.x86_64.rpm spice-server-debuginfo-0.12.4-13.el6.1.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
x86_64: spice-server-debuginfo-0.12.4-13.el6.1.x86_64.rpm spice-server-devel-0.12.4-13.el6.1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source: spice-server-0.12.4-13.el6.1.src.rpm
x86_64: spice-server-0.12.4-13.el6.1.x86_64.rpm spice-server-debuginfo-0.12.4-13.el6.1.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
x86_64: spice-server-debuginfo-0.12.4-13.el6.1.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:1204-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:1204
Issue date: 2016-06-06

Topic

An update for spice-server is now available for Red Hat Enterprise Linux 6.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security update buffer overflow Red Hat Enterprise Linux important memory access spice-server

Relevant Releases Architectures

Red Hat Enterprise Linux Desktop (v. 6) - x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - x86_64

Red Hat Enterprise Linux Workstation (v. 6) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - x86_64

Bugs Fixed

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

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