CVE-2016-4454: Buffer Overflow
First published: Mon May 16 2016(Updated: )
Quick Emulator(Qemu) built with the VMware-SVGA "chipset" emulation support is vulnerable to an information disclosure issue. It could occur while processing VGA commands via its FIFO buffer. A privileged user inside guest could use this flaw to leak host memory bytes or crash the Qemu process resulting in DoS. Upstream fix: ------------- -> <a href="https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg05271.html">https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg05271.html</a> Reference: ---------- -> <a href="http://www.openwall.com/lists/oss-security/2016/05/30/3">http://www.openwall.com/lists/oss-security/2016/05/30/3</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU | <=2.6.0 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Debian | =8.0 |
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Reference Links
- https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg05271.html
- http://www.openwall.com/lists/oss-security/2016/05/30/3
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1157905
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1157905&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1340741
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1340740
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1329189
- https://bugzilla.redhat.com/show_bug.cgi?id=1336429
- http://www.securityfocus.com/bid/90927
- http://www.ubuntu.com/usn/USN-3047-1
- http://www.ubuntu.com/usn/USN-3047-2
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
- https://security.gentoo.org/glsa/201609-01
Frequently Asked Questions
What is the severity of CVE-2016-4454?
The severity of CVE-2016-4454 is classified as a medium risk due to the potential for information disclosure and system crashes.
How do I fix CVE-2016-4454?
To fix CVE-2016-4454, upgrade QEMU to a version later than 2.6.0 that addresses this vulnerability.
Who is affected by CVE-2016-4454?
CVE-2016-4454 affects users running QEMU versions up to 2.6.0, particularly on Linux distributions such as Ubuntu and Debian.
What causes CVE-2016-4454?
CVE-2016-4454 is caused by an information disclosure flaw in the VMware-SVGA chipset emulation when processing VGA commands.
Can CVE-2016-4454 be exploited remotely?
CVE-2016-4454 requires a privileged user inside the guest to exploit, meaning remote exploitation is not possible.
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