Vulnerability CVE-2018-7858
Published: 2018-03-12

Description:
Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by leveraging incorrect region calculation when updating VGA display.

Type:

CWE-125

 (Out-of-bounds Read)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Redhat -> Enterprise linux desktop 
Redhat -> Enterprise linux server 
Redhat -> Enterprise linux server aus 
Redhat -> Enterprise linux server eus 
Redhat -> Enterprise linux server tus 
Redhat -> Enterprise linux workstation 
Redhat -> Virtualization 
QEMU -> QEMU 
Opensuse -> LEAP 
Canonical -> Ubuntu linux 

 References:
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
http://www.openwall.com/lists/oss-security/2018/03/09/1
http://www.securityfocus.com/bid/103350
https://access.redhat.com/errata/RHSA-2018:1369
https://access.redhat.com/errata/RHSA-2018:1416
https://access.redhat.com/errata/RHSA-2018:2162
https://bugzilla.redhat.com/show_bug.cgi?id=1553402
https://lists.nongnu.org/archive/html/qemu-devel/2018-03/msg02174.html
https://usn.ubuntu.com/3649-1/
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