CVE-2014-7815: Input Validation
bitsperpixel that are less than 8 could result in accessing non-initialized buffers later in the code due to the expectation that bytesperpixel value that is used to initialize these buffers is never zero.
An attacker having access to the guest's VNC console could use this flaw to crash the guest.
Acknowledgements:
Red Hat would like to thank James Spadaro of Cisco for reporting this issue.
Other sources
The setpixelformat function in ui/vnc.c in QEMU allows remote attackers to cause a denial of service (crash) via a small bytesperpixel value.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2014-7815?
CVE-2014-7815 has a medium severity level due to its potential to cause crashes when accessing non-initialized buffers.
How do I fix CVE-2014-7815?
To fix CVE-2014-7815, update your vulnerable software versions of QEMU and related operating systems to the latest available releases that address this vulnerability.
Who is affected by CVE-2014-7815?
CVE-2014-7815 affects users running specific versions of QEMU, Debian Linux, Red Hat Enterprise Linux, Ubuntu, and SUSE Linux.
What types of exploitation are possible with CVE-2014-7815?
An attacker having access to a guest's VNC console can exploit CVE-2014-7815 to crash the guest operating system.
When was CVE-2014-7815 disclosed?
CVE-2014-7815 was disclosed in late 2014 and affects software released before the subsequent updates that remedied the issue.