Vulnerability Details : CVE-2018-7858
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.
Vulnerability category: Denial of service
Products affected by CVE-2018-7858
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-7858
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 21 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-7858
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:N/A:P |
3.9
|
2.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2018-7858
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-7858
-
https://access.redhat.com/errata/RHSA-2018:2162
RHSA-2018:2162 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2018/03/09/1
oss-security - CVE-2018-7858 Qemu: cirrus: OOB access when updating vga displayMailing List;Patch;Third Party Advisory
-
http://www.securityfocus.com/bid/103350
QEMU CVE-2018-7858 Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
https://lists.nongnu.org/archive/html/qemu-devel/2018-03/msg02174.html
[Qemu-devel] [PATCH] vga: fix region calculationMailing List;Patch;Vendor Advisory
-
https://access.redhat.com/errata/RHSA-2018:1369
RHSA-2018:1369 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1553402
1553402 – (CVE-2018-7858) CVE-2018-7858 QEMU: cirrus: OOB access when updating VGA displayIssue Tracking;Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
[security-announce] openSUSE-SU-2019:1074-1: important: Security updateMailing List;Release Notes;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2018:1416
RHSA-2018:1416 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://usn.ubuntu.com/3649-1/
USN-3649-1: QEMU vulnerabilities | Ubuntu security noticesThird Party Advisory
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