CVE-2018-7858
The MITRE CVE dictionary describes this issue as:
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.
Find out more about CVE-2018-7858 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v2 metrics
| Base Score | 4.9 |
|---|---|
| Base Metrics | AV:A/AC:M/Au:S/C:P/I:P/A:P |
| Access Vector | Adjacent Network |
| Access Complexity | Medium |
| Authentication | Single |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | Partial |
CVSS v3 metrics
| CVSS3 Base Score | 5.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L |
| Attack Vector | Adjacent Network |
| Attack Complexity | High |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Changed |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | Low |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat OpenStack Platform 8.0 (Liberty) (qemu-kvm-rhev) | RHSA-2018:1646 | 2018-05-22 |
| Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (qemu-kvm-rhev) | RHSA-2018:1369 | 2018-05-10 |
| Red Hat OpenStack Platform 12.0 (qemu-kvm-rhev) | RHSA-2018:1643 | 2018-05-22 |
| Red Hat Enterprise Linux 7 (qemu-kvm) | RHSA-2018:1416 | 2018-05-14 |
| Red Hat Enterprise Linux 6 (qemu-kvm) | RHSA-2018:2162 | 2018-07-10 |
| Red Hat OpenStack Platform 10 (qemu-kvm-rhev) | RHSA-2018:1644 | 2018-05-22 |
| Red Hat OpenStack Platform 9.0 (qemu-kvm-rhev) | RHSA-2018:1645 | 2018-05-22 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat OpenStack Platform 11.0 (Ocata) | qemu-kvm-rhev | Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | qemu-kvm-rhev | Will not fix |
| Red Hat Enterprise Linux 7 | qemu-kvm-ma | Affected |
| Red Hat Enterprise Linux 5 | xen | Will not fix |
| Red Hat Enterprise Linux 5 | kvm | Will not fix |
Acknowledgements
Red Hat would like to thank Ross Lagerwall (Citrix.com) for reporting this issue.CVE description copyright © 2017, The MITRE Corporation